Welcome to the Quiz!
This quiz contains 10 questions from a mix of 1 subtopics.
What is the purpose of student's t-test?
to compare variances between two datasets
to compare modes between two datasets
to compare means between two datasets
to compare medians between two datasets
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Which of the following conditions must be met to use student's t-test?
(Select all that apply)
the data must be normally distributed
the variances of the populations should be different
the samples must be independent of each other
the data must be discontinuous
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How are the degrees of freedom calculated in a student's t-test?
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What does it mean when the t statistic is greater than the critical value in a student's t-test?
the test is inconclusive
the data are not normally distributed
reject the null hypothesis
accept the null hypothesis
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What does accepting the null hypothesis in a student's t-test suggest?
the variances are not equal
there is no significant difference between the means
the data are not normally distributed
there is a significant difference between the means
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What does xˉ1 represent in the t-test formula?
standard deviation of the second dataset
mean of the first dataset
standard deviation of the first dataset
mean of the second dataset
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What does σ2 represent in the t-test formula?
mean of the first dataset
standard deviation of the first dataset
standard deviation of the second dataset
mean of the second dataset
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What does n1 represent in the t-test formula?
sample size of the first dataset
critical value
degrees of freedom
sample size of the second dataset
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What does it mean when the t statistic is less than the critical value in a student's t-test?
reject the null hypothesis
accept the null hypothesis
the test is inconclusive
the data are not normally distributed
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What does rejecting the null hypothesis in a student's t-test indicate?
the data are not normally distributed
there is no significant difference between the means
the variances are not equal
the means are significantly different
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