In a Harris poll of 500 human resource professionals 30 said

In a Harris poll of 500 human resource professionals, 30% said that body piercings and tattoos were big grooming red flags. Use a 0.01 significance level to test the claim that less than 50% of all human resource professionals say that body piercings are big grooming red flags. Answer question 1 to 4 to complete the hypothesis test. 2. What is the test statistic? (Choose the one that is most close to your calculation) a) 0.01 b) -8.93 c) -9.76 d) -0.2 In a Harris poll of 500 human resource professionals, 30% said that body piercings and tattoos were big grooming red flags. Use a 0.01 significance level to test the claim that less than 50% of all human resource professionals say that body piercings are big grooming red flags. Answer question 1 to 4to complete the hypothesis test 3. What is the P-value? (Keep 3 decimal places) In a Harris po11 of 500 human resource professionals, 30% said that body piercings and tattoos were big grooming red flags. Use a 0.01 significance level to test the claim that less than 50% of all human resource professionals say that body piercings are big grooming red flags. Answer question 1 to 4 to complete the hypothesis test. 4. What is the conclusion? a) Reject HO. There s sufficient evidence to warrant rejection of the claim that less than 50% of all human resource professionals say that body piercings are big grooming red flags. b Reject HO. There is sufficient evidence to support the claim that less than 50% of all human resource professionals say that body piercings are big grooming red flags. c) Fail to reject HO. There is not sufficient evidence to support the claim that less than 50% of all human resource professionals say that body piercings are big grooming red flags. d) Fail to reject HO. There is not sufficient evidence to warrant rejection of the claim that less than 50% of all human resource professionals say that body piercings are big grooming red flags. If we would like to test a population mean and the population standard deviation is unknown, which test should we choose? a) A binomial test b) AZ-test c) AT-test d) A normal test Which one of the following is NOT a requirement to perform a T-test? a) The sample is a simple random sample b) The population is normally distributed c) The conditions np 5 and nq 5 are both satisfied The American Airlines flights would like to study the departure delay time. They would like to test the claim that the mean departure delay time for all flights from New York to Los Angeles is less than 12 min. They recorded 64 different departure delay times and found the mean is 10 min and the standard deviation is 30 min. Use a 0.01 significance level to test the claim. 1. Which is the correct hypothesis? a) H0:p10 Ha:

Solution

option a   ia correct

Null Hypothesis   p = 0.5

Alternate Hypothesis p <0.5