How to Perform One-Sample t-Test Step by Step
by I am going to teach you how to perform one-sample t-Test, step by step using an example Question A research believes that the mean incom …
Category: Hypothesis Testing
How to Perform Mann-Witney U Test(Step by Step) – Hypothesis Testing
by The Mann-Witney U Test is is an interesting procedure and really very straightforward if you would follow through. I happy to know that you are making …
How to Perform Wald-Wolfowitz Test – Testing for Homogeneity with Run Test
Today, we are going to go through the steps of performing the Wald-Wolfowitz test (run test). Remember, the easiest way to understand hypothesis testing is …
Hypothesis Testing Question 21 – Wald-Wolfowitz Run Test for Large Sample (Step by Step Procedure)
This is how to Perform Wald-Wolfowitz Run Test Question 21 The following arrangement of men, M, and women, W, lined up to purchase tickets for …
Hypothesis Testing Question 20 – Run Test( Suppose we flip a coin…)
Question 20 Suppose we flip a coin n = 15 times and come up with the following arrangements H T T T H H T …
Hypothesis Testing Question 19 – Run Test ( Trees were planted…)
Question 19 Trees planted along the road were checked for which ones are healthy(H) or deseased (D) and the following arrangement of the trees were …
What is Run Test in Statistics – A Simple Explanation with Step by Step Examples
The Run Test is actually one of the most interesting statistical test ever and it is so easy to understand, or even the easiest. Remember …
Chi-Square Test for independence – Question 18 (A publisher is interested…)
Question 18A publisher is interested in determing whinf of three book cover is most attractive. He interviews 400 people in each of the three states …
Chi-Square Test for Independence – Question 17(A research team…)
Question 17 A research team investigated whether there was any significant correlation between the severity of a certain disease runoff and the age of the …
Chi-Square Goodness of Fit Test – Question 16 ( A newly developed muesli…)
Question 16 A newly developed muesli contains five types of seeds (A, B, C, D and E). The percentage of which is 35%, 25%, 20%, …
Question 14 – Chi-Square Goodness of Fit Test Problem( Can a dice be considered…)
Question 14 Can a dice be considered regular which is showing the following frequency distribution during 1000 throws? Thrown Value 1 2 3 4 5 …
Kolmogorov-Smirnov Goodness of Fit Test
In this lesson, we are going to discuss the Kolmogorov-Smirnov Goodness of Fit test, how and when to perform it.Remember that the Kolmogorov-Smirnov Goodness of …
Question 13 – Chi-Square Test for Independence Step by Step Procedure(Political Affiliation…)
Question 13A random sample 500 U.S adults are questioned about their political affiliation and opinion on a tax reform bill. We need to test if …
How to Perform Fisher’s Test (F-Test) – Example Question 12
The F-Test one of the most basic and easy hypothesis testing to understand and perform.This tutorial explains how to perform Fisher’s test in statistics. ContentIn …
Hypothesis Testing Solved Examples(Questions and Solutions)
Here is a list hypothesis testing exercises and solutions. Try to solve a question by yourself first before you look at the solution. Question 1 …
Hypothesis Testing Problem – Question 3 (In a packing plant, a machine…
Question In a packaging plant, a machine packs cartons with jars. It is supposed that a new machine would pack faster on the average than …
Chi-Square Goodness of Fit Example – Step by Step Procedure
Question256 musicians were polled to determine their zodaic sign. The results are given belowAries 29Torus 24Gemini 22Cancer 19Leo 21Virgo 18Libra 19Scorpio 20Sagittarius 23Capricorn 18Aquarius 20Pisces …
Hypothesis Testing Question 9 – Wilcoxon Signed Rank Test
How to Conduct Wilcoxon Signed Rank Test QuestionBlood pressure reading of ten patients before and afer medication for reducing the blood pressure are as follows …
What are Non-Parametric Tests in Statistics?
Non-parametric tests which are also called distribution-free tests are applied when the distribution of the population is not known. In other words, non-parametric tests makes …
One-Way ANOVA(Analysis of Variance) Problem – Question 11
Question 11 Using the following three groups of data, perform a one-way analysis of variance using α = 0.05. Group 1 Group 2 Group 3 …
Excel Sheets For Statistics With Formulas For Free
Find a list of Excel Sheets used for Statistics in this site.1. Excel Sheet for Independent Sample t-Test – Question 3 2. Excel Sheet for …
Hypothesis Testing Problems – Question 10(Sussan Sound predicts that….)
Question on ANOVASussan Sound predicts that students will learn most effectively with a constant background sound, as opposed to an unpredictable sound or no sound …
How to Perform Analysis of Variance (ANOVA) – Step By Step Procedure
In this lesson, we would look at the steps to follow to perform Analysis of Variance(ANOVA). This would be very clear and easy to follow. …
Hypothesis Testing Problems – Question 8(An automatic cutter machine…)
Question An automatic cutter machine must cut steel strips of 1200 mm lenght. From a preliminary data, we checked that the lenghts of the pieces …
Hypothesis Testing Problems – Question 4( We want to compare the heights of…
QuestionWe want to compare the heights in inches of two groups of individuals. Here are the measurements:X: 175, 168, 168, 190, 156, 181, 182, 175, …
Welch’s t-Test – How and When to Use it
Welch’s t-testThe Welch’s t-test is also called unequal variances t-test that is used to test if the means of two populations are equal. This test …
Hypothesis Testing Problem – Quesion 7 (Test wether cars get better mileage…)
Question 7 A study was performed to test wether cars get better mileage on premium gas than on regular gas. Each of 10 cars was …
Hypothesis Testing – How to Perform Paired-Sample t-Test (With Python Codes)
What is paired-sample t-test? This is also called two-sample t-test or dependent samples t-test. This is a test used to compare the means of two …
Hypothesis Testing Problem – Quesion 6 (20 Students given diagnostic module…)
Question A sample of 20 students were selected and given a diagnostic module prior to studying for a test. And then they were given the …
Hypothesis Testing Problems – Question 5 ( A clinic provides a program to…
How to Perform Paired-Sample t-Test Question A clinic provides a program to help their clients lose weight and asks a consumer agency to investigate the …
Hypothesis Testing Problem – Question 2 ( A professor wants to know if…)
Question 2A professor wants to knowif her introductory statistics class has a good grasp of baic math. Six students are chosen at random form the …
Hypothesis Testing Problem – Question 1(In a population, the average IQ…
QuestionIn the population, the average IQ is 100 with a standard deviation of 15. A team of scientists want to test a new medication to …
Parametric Tests in Statistics – How to Know Which to Use
This is an easy topic to understand if you understand the basic concepts I am going to present in this article. So read carefully as …