Math 7A Chapter 10 Review

What is the mean of the data?

• 24.75

• 27

• 55

• 25.75

What is the median of the data?

• 20

• 25

• 26

• 52

What is the mode of the data?

• 0

• 35

• 55

• no mode

The company wants to claim it has a low cell phone return rate. Choose the best measure to use.

• mean

• median

• mode

• mode and mean

Which measure of variability does not correspond to the data?

• Median = 76

• First Quartile 65.5

• Third Quartile = 84

• Range = 90

What are the mean and mean absolute deviation of the data?

• mean = 5.75, mean absolute deviation = 1.5

• mean = 6.25, mean absolute deviation = 1.5

• mean = 5.75, mean absolute deviation = 1.2

• mean = 6.25, mean absolute deviation = 1.2

A teacher put names in a hat and selected 5 names without looking. What type of sample is this?

• Convenience Sample

• Systematic Random Sample

• Simple Random Sample

• Biased Sample

What inference can be supported by the double box plot?

• The data is symmetric in both box plots.

• Range of the data in the top is double that of the bottom.

• Medians are equal, the variability in the top is greater.

• Q3 and Q1 in the top are both less than those of the bottom.

A number cube is rolled. What are the probability & likelihood of it landing on an odd number?

• 0; impossible

• 1/6; equally unlikely

• 1/2; equally likely

• 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?

• the experimental probability is greater than the theoretical probability

• the experimental probability is less than the theoretical probability

• the experimental probability is equal to the theoretical probability