How to Perform a Normality Test on Minitab

Before you start performing any statistical analysis on the given data, it is important to identify if the data follows normal distribution. If the given data follows normal distribution, you can make use of parametric tests (test of means) for further levels of statistical analysis. If the given data does not follow normal distribution, you would then need to make use of non-parametric tests (test of medians). As we all know, parametric tests are more powerful than non-parametric tests. Hence, checking the normality of the given data becomes all the more important.

Write the hypothesis. A good way to perform any statistical analysis is to begin by writing the hypothesis. For normality test, the null hypothesis is “Data follows a normal distribution” and alternate hypothesis is “Data does not follow a normal distribution”.

Choose the data. Select and copy the data from spreadsheet on which you want to perform the normality test.

Paste the data in Minitab worksheet. Open Minitab and paste the data in Minitab worksheet.

Click “Stat”. In the menu bar of Minitab, click on Stat.

Click “Basic Statistics”.

Click “Normality Test”

Select data. A small window named “Normality Test” will pop-up on the screen. Click on the available option inside the white box and then Click “Select”.

• Be aware that the “Variable” tab will have the name of selected data.
• Also be aware that “Anderson-Darling” is already selected under “Tests for Normality”. Anderson-Darling is the most widely used Normality test. Hence, in Minitab, the default selection of Tests for Normality is “Anderson-Darling”.

Click “Ok”.

Understand the p-value displayed in the Normal Probability Plot. A normal probability plot will appear on the screen.

• Please observe if the p-value displayed in the normal probability plot is greater than 0.05 or is it lesser than 0.05.

Infer the results. As described in the step of writing the hypothesis, if we fail to reject the null hypothesis, the inference will be “Data follows a normal distribution”. If we reject the null hypothesis, the inference will be “Data does not follow a normal distribution”. Let’s link the p-value to the written hypothesis.

Do not reject null hypothesis if p-value is greater than 0.05. If the p-value observed in normal probability plot is greater than 0.05, we fail to reject the null hypothesis. Thus the inference is “Data follows a normal distribution”.

Reject the null hypothesis if p-value is lesser than 0.05. If the p-value observed in normal probability plot is less than 0.05, we reject the null hypothesis. Thus the inference is “Data does not follow a normal distribution”.

News Related
• How to Watch the 2021 Tokyo Summer Olympics

After a year&#8217;s delay due to the COVID-19 global pandemic, the 2020 Olympics are set to kick off in Tokyo on July 23, 2021. Even though the events are technically taking place in 2021, they&#8217;re still called the 2020 Olympics. The bad news is that international spectators aren&#8217;t allowed—but that ...

See Details: How to Watch the 2021 Tokyo Summer Olympics

• How to Become a Member of the YMCA

The YMCA offers a wide variety of services to its members at hundreds of centers across the United States. YMCA members have access to state-of-the-art fitness equipment, a broad range of wellness programs, and licensed child-care services. Most YMCAs offer flexible membership plans, including reduced fees for low-income participants. Steps ...

See Details: How to Become a Member of the YMCA

• How to Put Ski Bindings on Skis

Mounting ski bindings is something you can do yourself if you have the proper tools and know-how, including a drilling jig and a special drill bit. If you don’t have the right tools or aren’t confident in your ability to get the job done, it’s always best to have your ...

See Details: How to Put Ski Bindings on Skis

• How to Run a Fitness Boot Camp

A fitness boot camp is a type of physical training class that encourages participants to do cardiovascular and strength training through instructor-led exercises. The classes often include intervals, competitions and team work. It is available through gyms, private trainers and dedicated boot camp businesses. Boot camps may take place inside ...

See Details: How to Run a Fitness Boot Camp

• How to Do Qigong Hsing I Exercises

This article will show you how to do basic-advanced qigong that will develop internal strength and increase martial power. Though easy to perform these exercises are immensely effective. Steps Part 1 Part 1 of 2:Empty posture Download Article Stand normally with feet shoulder width apart. Your arms will rest normally ...

See Details: How to Do Qigong Hsing I Exercises

• How to Become a Football Player After 20

Soccer or football can sometimes seem like a young person&#8217;s game. But with the right attitude and preparedness, anyone who is fit and dedicated to the sport can get in the game. Here are a few tips to help you out if you&#8217;re over 20 and still keen to get ...

See Details: How to Become a Football Player After 20

• How to Do a Sitting to Standing Exercise

Moving from sitting to standing is a motion that most people already do throughout the day. However, when this motion is done mindfully, it can be a gentle&#8211;yet effective&#8211;exercise. This movement can strengthen your legs, lower back, and core. It can be especially helpful for older folks and people recovering ...

See Details: How to Do a Sitting to Standing Exercise

• How to Exercise

Exercise is a key part of staying healthy, but figuring out how to get more active can be tough. If you’re not used to physical activity, start slow. Go for 10 to 15 minute walks, and work your way up to briskly walking or jogging for 30 minutes daily. Try ...

See Details: How to Exercise

• How to Be Hygienic Using Public Swimming Pools

Exercise is a key part of staying healthy, but figuring out how to get more active can be tough. If you’re not used to physical activity, start slow. Go for 10 to 15 minute walks, and work your way up to briskly walking or jogging for 30 minutes daily. Try ...

See Details: How to Be Hygienic Using Public Swimming Pools

• How to Exercise Facial Muscles

Exercise is a key part of staying healthy, but figuring out how to get more active can be tough. If you’re not used to physical activity, start slow. Go for 10 to 15 minute walks, and work your way up to briskly walking or jogging for 30 minutes daily. Try ...

See Details: How to Exercise Facial Muscles

• How to Get Rid Of Man Breasts Through Exercise

Exercise is a key part of staying healthy, but figuring out how to get more active can be tough. If you’re not used to physical activity, start slow. Go for 10 to 15 minute walks, and work your way up to briskly walking or jogging for 30 minutes daily. Try ...

See Details: How to Get Rid Of Man Breasts Through Exercise

• How to Get PSA Grading

Exercise is a key part of staying healthy, but figuring out how to get more active can be tough. If you’re not used to physical activity, start slow. Go for 10 to 15 minute walks, and work your way up to briskly walking or jogging for 30 minutes daily. Try ...

See Details: How to Get PSA Grading

• How to Measure a Fitness Ball

Exercise is a key part of staying healthy, but figuring out how to get more active can be tough. If you’re not used to physical activity, start slow. Go for 10 to 15 minute walks, and work your way up to briskly walking or jogging for 30 minutes daily. Try ...

See Details: How to Measure a Fitness Ball

• How to Improve Reaction Speed

Exercise is a key part of staying healthy, but figuring out how to get more active can be tough. If you’re not used to physical activity, start slow. Go for 10 to 15 minute walks, and work your way up to briskly walking or jogging for 30 minutes daily. Try ...

See Details: How to Improve Reaction Speed

How to Become a Nike Authorized Dealer

Nike is an Oregon-based athletic company specializing in shoes and sportswear. From its modest beginnings in 1972, the company grew quickly and sells products in 130 countries today. If you ... Read more »

How to Learn Wing Chun

Wing Chun is a style of kung fu that emphasizes close quarter combat, quick punches and tight defense to overcome opponents. This traditional Chinese martial art destabilizes opponents with quick ... Read more »

How to Start a Dance Studio

Dance has been a traditional element of many cultures for centuries. Many different styles of dance are taught and practiced around the world, and dance studios are a common type ... Read more »

All kinds of athletes and performers raise their legs up to their heads, demonstrating flexibility and strength in their abilities. These include dancers, figure skaters, and martial artists, among others. ... Read more »

Proven Workouts and Exercises to Increase Your Athletic Speed

Whether you’re a runner, a basketball player, or a martial artist, speed is an advantage for any athlete! Get quicker on your feet by incorporating speed drills and sprints into ... Read more »

How to Display Hockey Cards

Instead of keeping your hockey cards stashed away in old shoe boxes, go ahead and show off some of your favorites! If you have some high-value cards, use professional-grade preservation ... Read more »

How to Fit a Riding Helmet

Whether you are a casual rider or a competitive equestrian, a well-fitted riding helmet is a must. You want a helmet that is made specifically for horseback riding, that fits ... Read more »

How to Go to the Himalayas

Traveling to the Himalayas can be a thrilling, life changing experience, so you’re probably really excited to plan your trip. The Himalayas are a mountain range in Asia that spreads ... Read more »

How to Travel to the Dominican Republic

If you’re dreaming of white sandy beaches and a lush, tropical landscape, head to the Dominican Republic for the trip of a lifetime. As the top destination in the Caribbean, ... Read more »

How to Strengthen Quads Using a Fitness Ball

Quad exercises are a great way to build strength in your upper legs, and, if done regularly, will yield results relatively quickly. Working your quads (the muscles along your thighs) ... Read more »

How to Reduce the Stress of Your Commute

Are your mornings filled with stress and anxiety due to your commute? Do you find yourself laying on the horn, screaming expletives at the drivers around you, and feeling extremely ... Read more »

How to Travel Around Taiwan

Taiwan is a beautiful island country located in East Asia, only a short distance from mainland China. In addition to the main island, Taiwan has many smaller islands and archipelagoes ... Read more »

How to Chew Betel Nut in Papua New Guinea

If you ever go to Papua New Guinea, the first thing you will notice is the brilliant red-stained teeth and lips of the local men and women. Betel nut, or ... Read more »

How to Plan a Spring Break Staycation

Typically, when it comes to spring break, ideas like vacations to the beach come to mind. You don’t, however, have to take a vacation to enjoy your spring break. Instead, ... Read more »

How to Travel During the Holidays for Seniors

The holidays are a great time for traveling to visit family and friends. If you’re a senior, there are special considerations to take into account during holiday travel. You want ... Read more »

How to Travel As a Photographer

Becoming a travel photographer is a dream for many. Being able to roam around the world, getting paid for taking photos of beautiful landscapes, and experiencing new cultures and people ... Read more »

How to Cope with Honeymoon Mishaps

Text Only Text Only Going on your honeymoon with your partner is a marriage rite of passage. You and your partner may have a romantic beach getaway planned or a ... Read more »

How to Get to the Galapagos Islands

The Galapagos Islands—made up of 13 main islands, 6 smaller islands, and 107 rocks and islets—is well-known for its amazing wildlife. If you plan on visiting the Galapagos, you’ll need ... Read more »

How to Disappear Completely

Whether you need to lay low or simply want to be left alone, disappearing might sound like a good idea. Running away usually isn’t necessary and most problems are solvable ... Read more »

How to Apply for ESTA

If you want to visit the US for a brief period, either for business or pleasure, you may qualify for travel authorization under the Electronic System for Travel Authorization (ESTA) ... Read more »

How to Travel With Children

Do you want to go on vacation, but need somewhere family friendly? Do you dread traveling with your children because of the inevitable headaches? Don’t put off travel altogether. Traveling ... Read more »

How to Write While Traveling

Writing while traveling can be either a professional or personal pursuit. Some people travel and write as part of their jobs, while others simply want to make the most out ... Read more »

How to Obtain a NEXUS Membership

NEXUS is a “Trusted Traveler” and accelerated border control program for pre-approved, low-risk travelers, allowing them quicker and smoother crossing between the Canada-United States border. Steps Download Article Find out ... Read more »

How to Apply for a Nigerian Visa

Except for nationals of some African countries, visitors to Nigeria generally need a visa to enter and depart the country. You can complete an online application to apply for a ... Read more »

How to Travel to Nigeria

If you’ve got an adventurous spirit and you’re looking for something off of the beaten path, Nigeria may be a great option for your next vacation! From sun-drenched beaches to ... Read more »

How to Make a Travel Brochure

A creative, expertly written and well-designed travel brochure invites readers to cast themselves into a story that takes place in an exotic locale. In this article, learn how to make ... Read more »

How to Travel Spontaneously

Traveling can be a pleasant, carefree experience, but the large amounts of planning and preparation which usually precede actually traveling can make the process seem like more trouble than it’s ... Read more »

How to Enjoy Niagara Falls when It Rains

It can be a let down if you get to Niagara Falls and it’s raining. Luckily, there are many indoor attractions you can still enjoy. Try to spend time at ... Read more »

How to Go to Sydney from Melbourne

Melbourne and Sydney are two of the largest cities in Australia, so it stands to reason you’d want to travel between them from time to time. Your main options for ... Read more »

How to Use the Mobile Passport App to Save Time at US Customs and Border Patrol

After flying internationally, you can speed up the US Customs and Border control process by using the easy-to-navigate Airside Mobile Passport app! Anyone who holds a US or Canadian passport ... Read more »

How to Dress in Egypt As a Woman

Whether you’re going for the ancient history, the modern cities, or the mesmerizing beaches, Egypt is a country you don’t want to miss out on. Since Egypt is a mostly ... Read more »

How to Enjoy Maui with the Kids

Whether you’re looking for a relaxing vacation or an action-packed trip, Maui is the perfect place to spend time together as a family. You’ll find plenty of activities geared towards ... Read more »

People love receiving gifts and when you’re traveling, it’s tempting to bring a piece of a faraway land back to others. Traveling abroad brings a host of concerns, including what ... Read more »

How to Ride your Bike to School Safely

Did you just learn how to ride a bike and want to ride it to school? Well, read this guide to do it. Steps Download Article Find a safe route ... Read more »

How to Prepare for a Trip to Israel

Also known as The Holy Land, Israel is a beautiful and diverse Mediterranean country with a history of religious significance dating back thousands of years. Despite its small size, millions ... Read more »

Planning a work-related trip can be a stressful endeavor. On top of your usual travel concerns, you also have to keep your mind focused on the business aspect of your ... Read more »

How to Plan a Trip to Blue Hole in Belize

Deep in the middle of the turquoise Caribbean Sea, is a large dark blue circle known worldwide as the “Blue Hole”. Situated in the centre of the Lighthouse Reef, the ... Read more »

How to Get to Lord Howe Island

Lord Howe Island is a popular year-round tourist destination and stopover spot for yachts sailing the Tasman Sea. Fly to the beautiful UNESCO World Heritage island on small propeller planes ... Read more »