Math 2 Statistics and Probability Pre-Assessment

Carla believes that the number of hours of video games a student plays is predictive of the student's GPA. Which value represents a correlation coefficient that would strongly support Carla's belief?

• 0.00

• -0.50

• -0.90

• 0.20

The box plots show the miles per gallon ratings distribution for three types of cars. Which statement best describes the variability of the MPG ratings for the cars?

• There is more variability in the MPG of the small cars than the sports cars and family cars.

• There is more variability in the MPG of the family cars than the sports cars and small cars.

• There is less variability in the MPG of the small cars than the family cars and sports cars.

• There is less variability in the MPG of the family cars than the sports cars and small cars.

The table shows the weights of 8 different bears at a zoo. If the weight of the polar bear is removed, which statement is true?

• The mean decreases more than the median because the polar bear is a higher outlier.

• The mean decreases less than the median because the polar bear is a high outlier.

• The mean decreases more than the median because the high value balances the low value.

• The mean decreases less than the median because the high value balances the low value.

A group of 10 students ate all 54 to 56 inches tall. An adult who is 74 inches tall joins the group. Which statement is true for this situation?

• None of the measures of central tendency (mean, median, mode) will be affected by the adult's height.

• The median height will be more affected by the adult's height than the mode(s) or the mean.

• The mode(s) will be more affected by the adult's height than the median or the mean.

• The mean height will be more affected by the adult's height than the mode(s) or the median.

Ms. Parker determined that the mean test score in her first period class was 81 with a standard deviation of 7.06. The mean test score in her second period class was 88 with a standard deviation of 8.24. Which conclusion can be made about her students' test scores?

• Period 2 had scores that were less spread out around the mean than Period 1.

• Period 1 had scores that were less spread out around the mean than Period 2.

• Period 2 had scores that were less spread out around the median than Period 1.

• Period 1 had scores that were less spread out around the median than Period 2.