Statistics Quiz Chapter 9

CHAPTER 9: FUNDAMENTALS OF HYPOTHESIS TESTING: ONE-SAMPLE TESTS

1. Which of the following would be an appropriate null hypothesis?

a) The mean of a population is equal to 55.

b) The mean of a sample is equal to 55.

c) The mean of a population is greater than 55.

d) Only (a) and (c) are true.

ANSWER:

a

TYPE: MC DIFFICULTY: Easy

KEYWORDS: form of hypothesis

2. Which of the following would be an appropriate null hypothesis?

a) The population proportion is less than 0.65.

b) The sample proportion is less than 0.65.

c) The population proportion is no less than 0.65.

d) The sample proportion is no less than 0.65.

ANSWER:

c

TYPE: MC DIFFICULTY: Easy

KEYWORDS: form of hypothesis

3. Which of the following would be an appropriate alternative hypothesis?

a) The mean of a population is equal to 55.

b) The mean of a sample is equal to 55.

c) The mean of a population is greater than 55.

d) The mean of a sample is greater than 55.

ANSWER:

c

TYPE: MC DIFFICULTY: Easy

KEYWORDS: form of hypothesis

4. Which of the following would be an appropriate alternative hypothesis?

a) The population proportion is less than 0.65.

b) The sample proportion is less than 0.65.

c) The population proportion is no less than 0.65.

d) The sample proportion is no less than 0.65.

ANSWER:

a

TYPE: MC DIFFICULTY: Easy

KEYWORDS: form of hypothesis

5. A Type II error is committed when

a) we reject a null hypothesis that is true.

b) we don't reject a null hypothesis that is true.

c) we reject a null hypothesis that is false.

d) we don't reject a null hypothesis that is false.

ANSWER:

d

TYPE: MC DIFFICULTY: Easy

KEYWORDS: type II error

6. A Type I error is committed when

a) we reject a null...