Question

1. A manager wants to see if the night shift and the day shift takes the same amount of breaks. What test should they use?

A. Student T-test

B. Test for homogeneity

C. Z-Score

D. None

2. A radio announcer claims that the high school volleyball team has a mean win of 6. You want to show that it is higher than that. What type of test would you use?

A. Right-tailed

B. Two-tailed

C. Left-tailed

D. All of above

3. A random survey of 65 breast cancer survivors revealed that the mean length of time on chemotherapy is 1.74 months with a standard deviation of 6.3 months. If you were conducting a hypothesis test to determine if the population mean time on chemotherapy could likely be 15 months, what would the alternative hypothesis be? Ha: _________

A. μ ≠ 1.74

B. μ > 15

C. μ ≠ 15

D. μ = 1.74

Answer 1

1) Answer: A) Student T-test

Explanation: To test the night shift and the day shift takes the same amount of breaks the independent two sample t test (Student T-test) is used.

2) Answer: A) Right-tailed

Explanation: We want to show that mean win higher than that 6, the a right tailed test we use.

3) Answer: C) μ ≠ 15

Explanation: The population mean time on chemotherapy could likely be 15 months, hence the alternative hypothesis is, the population mean time on chemotherapy not equal to 15 months.