Paired t test

What does the t-test for dependent samples test?

• The correlation between two variables

• Whether the mean value of two dependent samples significantly differ from each other

• The variance within a single sample

• The mean value of a single sample

What is the null hypothesis in the case of the dependent t-test?

• The sample data does not come from a normally distributed population

• There is no correlation between the two variables

• There is a significant difference between the means of the two dependent groups

• There is no significant difference between the means of the two dependent groups

How are the measured values treated in a dependent samples t-test?

• At a level in pairs

• As ordinal pairs

• At a nominal level

• As independent measurements

What is the first step in calculating a t-test for dependent samples?

• Measuring the weight of test persons

• Formulating your hypotheses

• Calculating the standard deviation

• Determining the critical t value

How do you calculate the number of degrees of freedom for a dependent samples t-test?

• Total number of measurements

• Number of cases plus one

• Number of pairs divided by two

• Number of cases minus one

What is the significance level set at for the example provided?

• 1%

• 5%

• 10%

• 2.5%

What assumption must be met for the t-test for dependent samples regarding the data scale?

• The variables must be independent

• The variables must be ordinal

• The variables must be nominal

• The variables must be metric

What does the p-value indicate in a t-test for dependent samples?

• The mean difference between the two samples

• The variance within the samples

• Whether the null hypothesis can be rejected or not

• The correlation coefficient between the two samples

What is the critical t value used for in the t-test?

• To calculate the standard deviation

• To determine if the null hypothesis is maintained or rejected

• To calculate the mean difference

• To determine the number of cases

What does it mean if the calculated t value is smaller than the critical t value?

• The test is inconclusive

• The alternative hypothesis is accepted

• The null hypothesis is rejected

• The null hypothesis is maintained