AP Stats Review

• I
• II
• III
• I, II, and III

• The slope decreased and the r² increased.
• The slope increased and the r² decreased.
• The slope decreased but r² remained the same.
• Both slope and r² remained the same.

What's the appropriate interpretation of the slope of the regression line?

• For every additional 0.61 hours of growth, the culture is predicted to weight 1 more gram.

• For every additional hour of growth, the culture is predicted to weigh 0.61 more grams.

• For every additional hour of growth, the logarithm of the culture's weight in grams is predicted to increase by 0.61.

• At the beginning of the experiment, the logarithm of the culture's weight in grams was approximately 0.61 ounces.

• A
• B
• C
• D

• B
• C
• D
• E

• A
• B
• C
• D

• B
• C
• D
• E

What is the inter-quartile range for these data?

• 3

• 4

• 5

• 6

• More females use social networking sites.
• In general, females use the sites more often than males.
• Approximately the same number of males and females were surveyed.
• About 43% of all students surveyed said they used social networking sites on a weekly basis.

• A
• B
• C
• D