Question 1

Correlation "r" is always between

options:

• 0 and 1
• 0 to +
• - and +
• -1 and 1

Question 2

A perfect correlation is when r =

options:

• -1
• 1
• 0
• 0.5
• -0.5

Question 3

Correlation is NOT sensitive to outliers. An extreme outlier will NOT cause a change in r.

options:

• False
• True

Question 4

Interchanging x and y does NOT change the correlation.

options:

• True
• False

Question 5

r has no units.

options:

• True
• False

Question 6

By looking at the plot, what was the lowest average daily temperature in the data set?

options:

Question 7

What was the sample size used for this data set?

options:

Question 8

What can you say about the correlation?

options:

• Strong, positive
• Strong, negative
• Weak, positive
• Weak, negative
• no correlation

Question 9

What type of transformation was used

options:

• Inverse
• Log
• Square root
• Square

Question 10

What is true about this graph?

• No apparent outliers
• Strong Correlation
• Weak Correlation
• Moderate Correlation
• positive correlation
• negative correlation
• no correlation

Question 11

If the heights where recorded in feet instead of inches, what would happen to the correlation?

options:

• stays the same
• increases
• decreases
• stronger (gets closer to +1 or -1)
• weaker (gets closer to 0)

Question 7 (1 point) Question 10 (1 point) Beach Visitors C 70 600 Question 11 (1 point) 60 525 50 450 40 375 30 Visitors 40 20 300 D 5 10 15 20 25 30 35 225 temp neight Years of Experience 150 75 3.0 Question 8 (1 point) 0 Height (in inches) 80 84 88 92 96 Beach Visitors 20 Average Daily Temperature (OF) 60temp Question 6 (1 point) 525 10 Beach Visitors 450 375 600 Visitors 300 525 10 Weight (in pounds) 40 50 225 450 20 30 150 375 75 Visitors 300 225 0 80 84 88 92 96 150 Average Daily Temperature (OF) 75 0 80 84 88 92 96 Average Daily Temperature (F)