Math Statistics Review

The scores awarded to 25 students for an assignment were as follows:

4 7 5 9 8 6 7 7 8 5 6 9 8 5 8 7 4 7 3 6 8 9 7 6 9

What is the mode?

• 6

• 7

• 8

• 9

Find the median of these numbers:
4,2,7,4,3

• 2

• 5

• 7

• 4

Describe the shape of the data.

• Symmetrical

• Skewed Left

• Skewed Right

Ms. Michaelson drew a box and whisker plot to represent her students’ scores on a recent math test.

If Jennifer scored an 86 on her test, how does she compare to the rest of the students in her class?

• Jennifer scored in the top 25% of her class.

• here is no way of knowing how Jennifer did compared to the rest of her class.

• There were not a lot of students who scored between 85 and 95 because the whisker on the higher end of the data is shorter.

The data below represent the number of absences and the final grade of 9 randomly selected students from a Math 1 class. The correlation coefficient for this data is -.94. What does this tell you?

• There is a strong negative correlation.

• There is a strong positive correlation.

• There is a weak negative correlation.

• There is a weak positive correlation.

How many students scored between a 86 and a 90?

• 1

• 3

• 6

• 10

Which best represents the Interquartile Range?

• 15

• 85

• 93

• 78

Using your linear regression, what is y when x is 30?

• 61.59

• 52.46

• 57.94

• 59.76

occurs when observations in a data set are NOT all the same

• variability

• statistically

• historically

• reliability

-sum divided by number of addends

• mean

• median

• mode

• range