Practice Quiz 4
... 8. If a one-tailed test with alpha = .05 is used, which critical value is higher, the one for the z-test or the one for the t-test? (1 mark) a) z-test b) t-test c) the critical values will be the same 9. Confirm or disconfirm the following claim: “As sample size increases, the t-distribution approac ...
... 8. If a one-tailed test with alpha = .05 is used, which critical value is higher, the one for the z-test or the one for the t-test? (1 mark) a) z-test b) t-test c) the critical values will be the same 9. Confirm or disconfirm the following claim: “As sample size increases, the t-distribution approac ...
Variables fall into two main categories: A categorical, or qualitative
... Another way to describe the spread of a distribution is by considering different percentiles. The pth percentile of a distribution is the value that has p percent of the observations at or below it. The median is the 50% percentile. The 25th percentile is called the 1st quartile while the 75th perce ...
... Another way to describe the spread of a distribution is by considering different percentiles. The pth percentile of a distribution is the value that has p percent of the observations at or below it. The median is the 50% percentile. The 25th percentile is called the 1st quartile while the 75th perce ...
Note
... 1σ the mean. About 95% of the observations will lie within 2σ of the mean. Virtually all (99.73%) the observations will be within 3σ of the mean. JDS Special Program: Pre-training ...
... 1σ the mean. About 95% of the observations will lie within 2σ of the mean. Virtually all (99.73%) the observations will be within 3σ of the mean. JDS Special Program: Pre-training ...
Properties of the Standard Deviation that are Rarely Mentioned in
... A very small value of σ means that all students have obtained almost the same grade. So the test was unable to distinguish between students’ abilities, putting them in one very homogeneous group. An extreme value of σ means that the test was too strict and classifies the students into two very diffe ...
... A very small value of σ means that all students have obtained almost the same grade. So the test was unable to distinguish between students’ abilities, putting them in one very homogeneous group. An extreme value of σ means that the test was too strict and classifies the students into two very diffe ...
