Statistics Final Exam Fully Solved 2026/27
Which major assumption of the t-test deals with the amount of variability in each group? -
CORRECT ANSWER Variances are equal
"independent" means that the groups are _______ - CORRECT ANSWER Not related in any way
The t test for independent means is used when you are looking at the difference in average
scores of one or more variables between ______ groups that are ______ of one another -
CORRECT ANSWER Two, independent
The t test for independent means is used when each group is tested ____ - CORRECT ANSWER
Only two groups in total
The t test for independent means is used when there are _____ - CORRECT ANSWER Only two
groups in total
If you want to examine the difference between the average scores of three unrelated groups,
which of the following statistical techniques should you select - CORRECT ANSWER Analysis of
variance
In the formula that computes a t value, what does n1 represent? - CORRECT ANSWER Number
of participants for group one
In the formula that computes a t value, what does s1^2 represent - CORRECT ANSWER Variance
for group one
In the formula that computes a value, what does x bar 1 represent - CORRECT ANSWER The
mean of group 1
, The null hypothesis in an independent-samples t test would be represented as - CORRECT
ANSWER Ho: x1 = x2
In the t test for independent samples, the actual statistical test is ___ - CORRECT ANSWER
Nondirectional
The research hypothesis in an independent samples t test would be represented as __- -
CORRECT ANSWER H1: x bar one is not equal to x bar two
In order to be 95% confident you have not committed a type 1 error, at what level should you
set your p-value - CORRECT ANSWER 0.05
In order to compute the test statistic or t value, you must first approximate the sample size by
calculating the _____________. - CORRECT ANSWER Degrees of freedom
The t test for independent samples assumes which of the following - CORRECT ANSWER Scores
are independent
When examining group difference where no direction of the difference is specified, which of the
following is used - CORRECT ANSWER Two tailed test
When examining group difference where the direction is specified, which of the following is
used - CORRECT ANSWER One tailed test
The test statistic calculated by the statistical procedure selected is known as the ________ -
CORRECT ANSWER Obtained value
In order to determine whether or not you will reject the null hypothesis, the test statistic must
be compared against the ______ - CORRECT ANSWER Critical value
Which major assumption of the t-test deals with the amount of variability in each group? -
CORRECT ANSWER Variances are equal
"independent" means that the groups are _______ - CORRECT ANSWER Not related in any way
The t test for independent means is used when you are looking at the difference in average
scores of one or more variables between ______ groups that are ______ of one another -
CORRECT ANSWER Two, independent
The t test for independent means is used when each group is tested ____ - CORRECT ANSWER
Only two groups in total
The t test for independent means is used when there are _____ - CORRECT ANSWER Only two
groups in total
If you want to examine the difference between the average scores of three unrelated groups,
which of the following statistical techniques should you select - CORRECT ANSWER Analysis of
variance
In the formula that computes a t value, what does n1 represent? - CORRECT ANSWER Number
of participants for group one
In the formula that computes a t value, what does s1^2 represent - CORRECT ANSWER Variance
for group one
In the formula that computes a value, what does x bar 1 represent - CORRECT ANSWER The
mean of group 1
, The null hypothesis in an independent-samples t test would be represented as - CORRECT
ANSWER Ho: x1 = x2
In the t test for independent samples, the actual statistical test is ___ - CORRECT ANSWER
Nondirectional
The research hypothesis in an independent samples t test would be represented as __- -
CORRECT ANSWER H1: x bar one is not equal to x bar two
In order to be 95% confident you have not committed a type 1 error, at what level should you
set your p-value - CORRECT ANSWER 0.05
In order to compute the test statistic or t value, you must first approximate the sample size by
calculating the _____________. - CORRECT ANSWER Degrees of freedom
The t test for independent samples assumes which of the following - CORRECT ANSWER Scores
are independent
When examining group difference where no direction of the difference is specified, which of the
following is used - CORRECT ANSWER Two tailed test
When examining group difference where the direction is specified, which of the following is
used - CORRECT ANSWER One tailed test
The test statistic calculated by the statistical procedure selected is known as the ________ -
CORRECT ANSWER Obtained value
In order to determine whether or not you will reject the null hypothesis, the test statistic must
be compared against the ______ - CORRECT ANSWER Critical value
