QUESTION: A company union claims that the mean number of hours all employees work per week is more t

QUESTION: A company union claims that the mean number of hours all employees work per week is more than 45 From a sample of 32 employees, the mean number of hours worked per week was 48 and the standard deviation was 108 hours Assume the population is normally distributed At ???? = 01, is there enough evidence to support the union’s claim?

QUESTION: The population of all verbal GRE scores are known to have a standard deviation of 85 The PSU Psychology department claims its applicants have an verbal GRE scores of 210 This year, the mean verbal GRE scores for the 42 applicants was 21279 Using a value of ? = 005 is there evidence that the mean verbal GRE score is not 210?