AP Statistics Section 3.1

Which of the following statements is not true of the correlation r between the lengths in inches and weights in pounds of a sample of brook trout?

• r must take a value between -1 and 1.
• r is measured in inches.
• If longer trout tend to also be heavier, then r>0.
• r would not change if we measured the lengths of the trout in centimeters instead of inches.

Tags

CCSS.HSS.ID.C.8

CCSS.HSS.ID.C.9

What is the correlation?

• Negative correlation
• No correlation
• Positive correlation
• Cannot be determined

Tags

CCSS.HSF-LE.A.1B

What is the IQR of the Cruisers?

• 4

• 6

• 9

• 13

Tags

CCSS.HSS.ID.A.1

CCSS.HSS.ID.A.3

CCSS.HSS.ID.A.2

What percent of students have a height between 60 inches and 66 inches?

• 25%

• 50%

• 75%

• 100%

Tags

CCSS.HSS.IC.B.4

CCSS.HSS.ID.A.4

CCSS.HSS.IC.A.1

The dotplot displays the total number of miles that the 28 residents of one street in a certain community traveled to work in one five-day workweek. Which of the following is closest to the percentile rank of a resident from this street who traveled 85 miles to work that week?

• 60

• 70

• 75

• 80

• 85

Tags

CCSS.HSS.ID.A.1

The three central tendencies are called

• skewness, outliers, quartiles
• mean, median, mode
• percentiles, z - scores, mean
• Q1, Q2, Q3

Tags

CCSS.6.SP.A.3

in order to calculate z - score, we

• need to know the raw score, mean and SD
• mean and SD
• raw score and SD
• Large Counts Condition

Tags

CCSS.HSS.ID.A.4

Z - score is also called

• mean score 
• median score
• table A score
• standardized score

Which of the following statements is not true of the correlation r between the lengths in inches and weights in pounds of a sample of brook trout?

• r must take a value between -1 and 1.
• r is measured in inches.
• If longer trout tend to also be heavier, then r>0.
• r would not change if we measured the lengths of the trout in centimeters instead of inches.

Tags

CCSS.HSS.ID.C.8

A medical researcher collects health data on many women in each of several countries.  One of the variables measured for each woman in the study is her weight in pounds.  The following list gives the five-number summary for the weights of women in one of the countries.   
Country A:  100, 125, 130, 165, 205 
 About what percent of Country A women weigh between 125 and 205 pounds? 

• 25%
• 50%
• 75%
• 80%

Tags

CCSS.HSS.IC.B.4