The mode is most meaningful for which type of data?
a. Measurement data
b. Categorical data
c. Biased data
d. None of the above
Q. 2Which of the following measures of center is affected by an outlier?
a. Mean
b. Median
c. Mode
d. All of the above
Q. 3Name two questions that can be answered by determining the shape of a data set.
Q. 4Bob has taken 6 quizzes so far in his statistics class. Each quiz has a possible of 10 total points. Bob's scores are the following: 10, 8, 9, 7, 2, and 9 . Explain how (if) Bob's lowest quiz score affects the mean and the median of this data set.
Q. 5Bob has taken 6 quizzes so far in his statistics class. Each quiz has a possible of 10 total points. Bob's scores are the following: 10, 8, 9, 7, 2, and 9 . Find the three measures of center for Bob's quiz scores.
Q. 6Name the four kinds of useful information that you can get about a set of measurement data once it has been organized and summarized.
Q. 7Four hundred women participated in this study. Researchers found that children ages 3 and 4 whose mothers smoked 10 or more cigarettes a day during pregnancy scored about 9 points lower on intelligence tests than the children of nonsmokers. The gap narrowed to 4 points against children of nonsmokers when a wide range of interrelated factors were controlled for. The lead researcher was quoted as saying It is comparable to the effects that moderate levels of lead exposure have on children's IQ scores.. Which of the following describes difficulties with this study?
a. Generalizability
b. Confounding variables
c. Possible experimenter effect
d. All of the above
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