Question 6 (3 points) A hypothesis test is conducted to test the difference between two population means. Assume that the population standard deviations are known and the null hypothesis is: H01u1-u250 What is the p-value if the test statistic has been found to be 2 = 2.52? O 0.0118 Q 0.0059 Q 0.9882 0 0.4941 Question 7 (3 points) After taking a speed-reading course, students are supposed to be able to read faster than they could before taking the course. A sample of 20 students is randomly selected from those who take a speed-reading course. Each student's speed of reading words per minute is recorded at the beginning and at the end of the course. To test whether the speed-reading course is effective, the data should be treated as O matched samples using the t distribution 0 matched samples using the normal distribution 0 independent samples using the t distribution 0 independent samples using the normal distribution Question 8 (3 points) We are interested in testing the following hypotheses: H03 H1 - M2 = 0 Ha: U1 - H2 0 The 2 test statistic was found to be 2.15. The p-value for this test is __________ . Q 0.0158 0 0.9842 Q 0.0316 0 0.9684 Question 9 (3 points) An analyst would like to test the hypothesis that the average number of hours per week that an American works is higher than the average number of hours per week that a Swede works. The following data summarizes the sample statistics for the number of hours worked per week for workers in each country. American Swede Sample Mean (hours) 32.7 28.2 Sample Size 15 12 Sample Standard DeVIatIon 5.1 6.0 (hours) Define Population 1 as American workers and Population 2 as Swedish workers. The p-Value for this hypothesis test is __________ . Define Population 1 as American workers and Population 2 as Swedish workers. The p-value for this hypothesis test is between 0.005 and 0.01 between 0.05 and 0.10 between 0.025 and 0.05 between 0.01 and 0.025Question 10 (3 points) A political analyst in the state of Illinois surveys a random sample of registered Democrats and compares the results with those obtained from a random sample of registered Republicans. This would be an example of __________ . O matched samples only if the sample sizes are equal 0 matched samples O independent samples only if the sample sizes are equal 0 independent samples