QUIZ 2_T-Test

What is the purpose of a t-test?

• To compare variances between two groups

• To determine if there is a significant difference between the means of two groups

• To analyze categorical data

• To calculate correlation coefficients

How many types of t-tests are there?

• One

• Two

• Three

• Four

When do we use a one sample t-test?

• When comparing the means of two independent groups

• When comparing the means of two dependent groups

• When comparing the mean of a sample with a known reference mean

• When comparing the variances of two groups

Which of the following is an example of a one sample t-test?

• Comparing the effectiveness of two painkillers

• Comparing the weights of chocolate bars from a certain manufacturer to a known reference mean

• Comparing the blood pressure of patients before and after treatment

• Comparing the income of two different professions

When is a t-test for independent samples used?

• When comparing the means of two dependent groups

• When comparing the means of two independent groups

• When comparing the means of more than two groups

• When comparing the medians of two groups

In a paired t-test, what are the measured values available in?

• Triplets

• Quadruplets

• Pairs

• Singles

What is a prerequisite for conducting a t-test?

• Normal distribution of the data

• Skewed distribution of the data

• Categorical data

• Non-metric variables

Which of the following is NOT a type of t-test?

• One sample t-test

• ANOVA

• Independent sample t-test

• Matched pair t-test

What type of variable is required for a t-test?

• Categorical

• Non-metric

• Discrete

• Metric

What is the null hypothesis for a one sample t-test?

• The sample mean is equal to the given reference value

• The sample mean is not equal to the given reference value

• The means in the two groups are equal

• The mean of the differences between the pairs is zero