CH 10 Test Review

What are the mean, median, and mode of the data?

• mean = 24.75; median = 26; no mode

• mean = 24.75; median = 20; mode = 55

• mean = 27.00; median = 26; no mode

• mean = 55.00; median = 52; mode = 0

A manufacturer wants to claim that it has a low cell phone return rate. Choose the best measure(s) of center for the manufacturer to use.

• mean

• median

• mode

• mode and mean

The table shows the number of homes in 12 different counties that use a solar heating system. Which measure of variability does not correspond to the data?

• median = 76

• third quartile = 84

• range = 90

• first quartile = 65.5

What are the mean and the mean absolute deviation of the data set: 7, 8, 4, 5, 8, 3, 5, 6?

• mean = 5.75; mean absolute deviation = 1.5

• mean = 5.75; mean absolute deviation = 1.2

• mean = 6.25; mean absolute deviation = 1.2

• mean = 6.25; mean absolute deviation = 1.5

Mr. Hou put student names in a hat and selected five names without looking. What type of sample did he use?

• simple random sample

• systematic random sample

• biased sample

• convenience sample

Which inference can be supported by the double box plot?

• The data is symmetric in both box plots.

• The medians are about the same but the variability in the top plot is much greater than the variability in the bottom plot.

• The range of the data in the top plot is double that of the bottom plot.

• The third and first quartiles of the top plot are both less than those of the bottom plot.

A six-sided number cube whose sides are numbered 1 through 6 is rolled. What are the probability and the likelihood of the cube landing on an odd number?

• 1/2 ; equally likely

• 1/6 ; equally unlikely

• 0 ; impossible

• 1 ; certain

A spinner with four equal-size sections marked X, Y, Z, and Q is spun 100 times. The spinner lands on X 20 times. Which comparison of the experimental probability and theoretical probability of the spinner landing on X is valid?

• 20% < 25%

• 20% = 20%

• 20% > 10%

• 20% < 50%

A newborn puppy is equally likely to be male or female. What is the probability that the first four puppies that a dog gives birth to are female?

• 1/2

• 1/8

• 1/16

• 0

When Blake loads a washing machine, he needs to choose a load setting of large, delicate, or small; a water temperature setting of hot, warm, or cold; and a regular rinse cycle or an extra rinse cycle. What is the possible number of outcomes in this situation?

• 8

• 9

• 18

• 27