Probability and Statistics Middle School Review

Which describes the shape of the distribution?

• skewed right

• skewed left

• symmetric

• uniform

Which measure of center will be the smallest?

(Remember which one pulls toward the tail)

• median

• mean

• mode

Describe the shape of the graph.

• skewed

• symmetrical

• uniform

What is the shape of the distribution?

• symmetric

• uniform

• skewed to the right

• skewed to the left

What is the shape of the data?

• symmetrical

• skewed left

• skewed right

• uniform

From the histogram, estimate the mean number of chairs.

• 11

• 15

• 25

• 38

When using IQR to find outliers, which formula will identify the lower limit?

• 1.5(IQR)

• Q1 + 1.5(IQR)

• Q1 - 1.5(IQR)

• Q3 + 1.5(IQR)

If $88,000 was found to be an outlier, which salary would be the new maximum?

• $55,000

• $28,000

• $88,000

• $72,000

The data set below has an outlier of 42.
2, 5, 12, 15, 19, 4, 6, 11, 16, 18, 12, 12, 42
What effect does removing the outlier have on the distribution of the data?

• The mean will decrease

• The median will decrease

• The mean will increase

• The median will increase

If my data set had an outlier that was quite a bit more than the other numbers in my data set, what would it do to my average

• leave it the same

• increase the average

• decrease the average