AP Stats CED Unit 1 MC Review

Front

The boxplots above summarize two data sets, A and B. Which of the following must be true? I. Set A contains more data than Set B. II. The box of Set A contains more data than the box of Set B. III. The data in Set A have a larger range than the data in Set B.

Back

III only

Front

A student has a standardized score of z = -1.2 on a test. What score did this student receive?

Back

779.42

Front

Relative to the students in each respective class, in which subject did a student who scored 81 on the chemistry final (mean = 75, SD = 12) and 84 on the calculus final (mean = 80, SD = 8) do better?

Back

The student did equally well in each course.

Front

Approximate interquartile range (IQR) of ages from a boxplot of 374 US pennies.

Back

16

Front

The histogram below displays the frequencies of waiting times, in minutes, for 175 patients in a dentist's office. Which of the following could be the median of the waiting times, in minutes? Options: 2.5, 7.25, 12.25, 15, 17.50

Back

7.25

Front

Weight of a female grizzly bear with the same z-score as a male grizzly bear weighing 530 pounds. Mean (male): 500 lbs, SD (male): 50 lbs, Mean (female): 300 lbs, SD (female): 40 lbs.

Back

324 pounds

Front

For a sample of 42 rabbits, the mean weight is 5 pounds and the standard deviation of weights is 3 pounds. What is most likely true about the weights for the rabbits in this sample?

Back

The distribution of weights is skewed to the right because the least possible weight is within 2 standard deviations of the mean.

Front

The histogram above shows the number of minutes needed by 45 students to finish playing a computer game. Which of the following statements is correct?

• The distribution is skewed to the right.
• The distribution is skewed to the left.
• The distribution appears to be normal.
• The distribution appears to be chi-square.
• The distribution appears to be uniform.

Back

The distribution is skewed to the left.

Front

Data were collected on the amount, in dollars, that individual customers spent on dinner in an Italian restaurant. The quartiles for these data are given in the picture. Which of the following statements must be true for these customers?

Back

At least half of the customers spent less than or equal to $44.27 and at least half spent greater than or equal to $44.27.

Front

Which statement is NOT justified by the back-to-back stem-and-leaf plot data on school drop-out rates?

Back

The drop-out rate decreased in each of the 49 schools between the 1989-90 and 1992-1993 school years.