Exam 13: Violence and Unintentional Injuries

Medicare would like to test the hypothesis that the standard deviation for the monthly rate for a one- bedroom assisted- living facility is more than $400. A random sample of 17 assisted living facilities had a standard deviation of $530. The test statistic for this hypothesis test would be ________.

A golfer would like to test the hypothesis that the variance of his golf score equals 10.0. A random sample of 28 rounds of golf had a sample standard deviation of 3.5. The degrees of freedom for this hypothesis test would be _______.

Travelocity would like to test if the standard deviation for roundtrip airfares between New York and London is less than $200. The correct hypothesis statement would be _____.

The test statistic that is used to test the variance of a single population follows the normal probability distribution.

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 _______.

Travelocity would like to test if the standard deviation for roundtrip airfares between New York and London is less than $200. A random sample of 22 roundtrip airfares between New York and London had a standard deviation of $142. The degrees of freedom for this hypothesis test would be _______.

There is no statistical technique for directly testing a hypothesis about a population standard deviation.

When performing a hypothesis test that compares the variances of two populations, always assign the smaller sample variance to Population 1 and the larger sample variance to Population 2.

The rejection region for a two- population variance test will always be in the lower tail of the sampling distribution.

Medicare would like to test the hypothesis that the standard deviation for the monthly rate for a one- bedroom assisted- living facility is more than $400. The correct hypothesis statement would be ______.

In order to get valid results, the hypothesis test for a variance for a single population requires that the population from which the sample is drawn to be normally distributed.

Travelocity would like to test if the standard deviation for roundtrip airfares between New York and London is less than $200. A random sample of 22 roundtrip airfares between New York and London had a standard deviation of $142. The test statistic for this hypothesis test would be ______.

Travelocity would like to test if the standard deviation for roundtrip airfares between New York and London is less than $200. A random sample of 22 roundtrip airfares between New York and London had a standard deviation of $142. Using α = 0.05, the conclusion for this hypothesis test would be that because the test statistic is ______.

YouTube would like to test the hypothesis that the standard deviation for the length of an online video watched by a user is more than 2 minutes. A random sample of 21 people who watched online videos was selected. The sample standard deviation for the length of the video was found to be 2.5 minutes. The degrees of freedom for this hypothesis test would be _______.

A golfer would like to test the hypothesis that the variance of his golf score equals 10.0. A random sample of 28 rounds of golf had a sample standard deviation of 3.5. The test statistic for this hypothesis test would be ______

Entertainment Software Association would like to test if the standard deviation for the age of "gamers" (those that routinely play video games)is equal to 6.0 years. The correct hypothesis statement would be .

YouTube would like to test the hypothesis that the standard deviation for the length of an online video watched by a user is more than 2 minutes. The correct hypothesis statement would be .

Medicare would like to test the hypothesis that the standard deviation for the monthly rate for one- bedroom assisted- living facility is more than $400. A random sample of 17 assisted living facilities had a standard deviation of $530. Using α = 0.01, the critical value for this hypothesis test would be ______.

A golfer would like to test the hypothesis that the variance of his golf score equals 10.0. A random sample of 28 rounds of golf had a sample standard deviation of 3.5. Using α = 0.10, the conclusion for this hypothesis test would be that because the test statistic is _______.

In 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.