A professor would like to test the hypothesis that the average number of minutes that a student needs to complete a statistics exam has a standard deviation that is less than 5.0 minutes.
A random sample of 15 students was selected and the sample standard deviation for the time needed to complete the exam was found to be 4.0 minutes. The test statistic for this hypothesis test would be ________.A) 8.96
B) 10.42
C) 13.61
D) 17.67
Q. 2The ratio data has all of the properties of interval data with the added feature of having a true zero point.
Indicate whether the statement is true or false
Q. 3In order to get valid results, the hypothesis test for comparing two population variances requires that the populations from which the samples are drawn be normally distributed.
Indicate whether the statement is true or false
Q. 4Without the finite population correction factor, the standard error is overestimated when calculating a confidence interval for a finite population.
Indicate whether the statement is true or false
Q. 5The Central Limit Theorem plays an important role in statistics because it provides information about the shape of the _____________________________
________.
A) population distribution when the sample size is sufficiently large
B) sampling distribution when the sample size is sufficiently large
C) population distribution for any sample size
D) sampling distribution for any sample size
Q. 6Normalized seasonal factorsareseasonal factors that are adjusted so they add up to a number very close to 1.0.
Indicate whether the statement is true or false
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