Question: The process of estimation would be most likely to occur in which of the following cases?

Answer Choices: A. Survey 500 students at CSULB about political debates
B. Interview 30 seventh graders on smoking campaign
C. Track one computer class’s internet use
D. All of the above

Answer: D. All of the above

 

Question: Score: 64, Mean: 81, Variance: 49, Normal distribution. What is the standard deviation?

Answer Choices: A. 8
B. 7
C. (Unreadable)
D. 10

Answer: B. 7

 

Question: In social scientific research, “significance” means that an important effect was identified.

Answer Choices: A. True
B. False

Answer: B. False

 

Question: The measure of central tendency is less useful when extreme scores are present.

Answer Choices:

Answer: True

 

Question: Erin was interested in assessing GPA differences among club and non-club members. What test statistic should she use?

Answer Choices: A. One-variable chi-square
B. Two-variable chi-square
C. T-test
D. Correlation

Answer: C. T-test

 

Question: A researcher reports that 70% of the sample surveyed like a product. This is an example of:

Answer Choices: A. Inferential statistics
B. Descriptive statistics
C. Hypothesis testing

Answer: B. Descriptive statistics

 

Question: The most comprehensive measure of central tendency is the ______ and it is appropriate for analyzing ______ data.

Answer Choices: A. mode and nominal
B. mean and ordinal
C. median and interval/ratio
D. mean and interval/ratio

Answer: D. mean and interval/ratio

 

Question: ______ drives the research and is tested in the research.

Answer Choices: A. Hy Hy
B. The null; Ho
C. Ho; Hy
D. The research hypothesis; H₁

Answer: D. The research hypothesis; H₁

 

Question: Significance testing, or testing for significant statistical differences between groups and statistical relationships between variables, is one inter-related purpose of inferential statistics.

Answer Choices: A. True
B. False

Answer: A. True

 

Question: The mean is the best measure of central tendency for ordinal level data.

Answer Choices: A. True
B. False

Answer: B. False

 

Question: ______ error occurs when researchers reject a null hypothesis and support a research hypothesis when, in fact, the null hypothesis is probably true.

Answer Choices: A. Type I
B. Type II
C. Spurious
D. Both a and b

Answer: A. Type I

 

Question: Inferential statistics focus on the use of numerical indicators to describe the sample population examined in a given study.

Answer Choices: A. True
B. False

Answer: B. False