Describing Location in a Distribution

Terrina calculated her z-score for a recent test after the teacher provided the mean and standard deviation. It was 0.75. Interpret this z-score

• Terrina scored 0.75 standard deviations above the mean

• Terrina did as well or better than 75% of the students who took the test

• Terrina did as well or worse than 75 of the students who took the test

• Terrina scored 0.75 standard deviations below the mean.

The figure is a cumulative relative frequency graph of the amount spent by 50 consecutive grocery shoppers at a store. Estimate the IQR.

• $40

• $27

• $19 to $46

• 75% −− 25% = 50%

Which statement best describes this graph?

• There is a peak at 47.

• There is a cluster around 38-40.

• The mode is 38.

• There is a gap in the data between 39-40.

What is shape of the data?

• symmetrical

• skewed left

• skewed right

• bell curve

• Skewed up box

• Skewed to the left

• Skewed to the right

Which of the following best describes the shape of the distribution?

• SKEWED LEFT

• SKEWED RIGHT

• UNIFORM 

• SYMMETRICAL

Which statement best describes this graph?

• There is a peak at 2.

• There is a gap in the data.

• Most people own 1 pet.

• There is no mode.

Which statement best describes the graph?

• The data is skewed left.

• The data is symmetrical.

• There is a peak between 10 and 14 hours.

• There is a cluster between 5 and 9

Where is the gap in the data?

• between 23 and 25

• between 17 and 20

• at 18

• at 22

Which statement best describes this distribution?

• Symmetrical or "Bell-Shaped"

• Symmetrical with a U shape

• Skewed Left

• Skewed Right