Scatter Plots Quiz

If a ski resort got 6 inches of snow in a week, what is the best estimate for the number of skiers they could expect?

• 12 skiers

• 115 skiers

• 220 skiers

• 100 skiers

Tags

CCSS.HSF.IF.A.2

If 750 skiers visit the resort, what would be the best estimate for the inches of snowfall the resort received that week?

• 30 inches

• 15 inches

• 25 inches

• 40 inches

The table shows the number of items several shoppers purchased and the amount of time it took them to check out. Find the correlation coefficient and describe the association.

• r = 0.95; strong positive correlation

• r = -0.45; strong negative correlation

• r = 0.44; weak positive correlation

• r = 0.44; weak negative correlation

Tags

CCSS.HSS.ID.C.8

Zoe's and Lydia are each given a scatter plot. Zoe's has a correlation coefficient of -0.25 while Lydia's has a correlation coefficient of -0.75. Which of the following must be true?

• Lydia's graph has a steeper slope than Zoe's.

• The points on Lydia's graph are more spread out than the points on Zoe's graph.

• Zoe's graph contains more data points than Lydia's.

• The data points on Zoe and Lydia's graphs both decrease from left to right.

Tags

CCSS.HSS.ID.C.8

Which of the described situations is an example of causation?

• A only

• B only

• Both A and B

• Neither A nor B

Tags

CCSS.HSS.ID.C.9

Which function would best model the data in the scatter plot?

• y = -x + 21

• y = 2/3x + 30

• y = -2/3x + 29

• y = x + 29

Which is a reasonable estimate for the correlation coefficient of the scatter plot?

• r = -0.92

• r = 0.35

• r = -0.23

• r = 0.94

Tags

CCSS.HSS.ID.C.8