Chapter 9 Review- PRE

What type of association does this graph have?

• positive
• negative
• none
• all of the above

What type of association
 is this ?
The outside temperature and the amount of layers you wear. 

• Positive
• Negative
• No association

The red line represents the line of best fit for the scatter plot. How many ice cream sales are expected if the temperature is 90°?

• 55
• 0
• 103
• 100

In a sample of voters in Harrisburg, 18 out of 25 favored creating a new shopping center. If 50,000 people vote in the next Harrisburg election, how many are likely to vote in favor of the new shopping center based on this sample?

• 40,000
• 14,000
• 36,000
• 28,000

Tags

CCSS.7.RP.A.3

Suppose 7/10 of people surveyed agree that dogs are the best pets to own. How many people out of 500 would you expect to say they DO NOT think dogs are the best pet?

• 350
• 200
• 250
• 150

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.3

Which of the following statements is NOT true according to the dot plot?

• The distribution is non-symmetric
• There is a gap in the data
• There are no outliers
• There is a peak at 4

• The distribution is non-symmetric. There is a peak at 8. There is an outlier.
• The distribution is symmetric. There is a peak at 8. There are no outliers.
• The distribution is symmetric. There is a peak at 8. There is an outlier.
• The distribution is non-symmetric. There is a peak at 8. There are no outliers.

What is incorrect about the following histogram?

• There is a peak at 4-5 minutes and 5-6 minutes
• There are gaps in the data
• The distribution is non-symmetric
• There are no outliers

What type of a survey is it when members of the population are chosen because they are easily accessible?

• Systematic Random Sample
• Convenience Sample
• Simple Random Sample
• Voluntary Response Sample

What type of a survey is it when items or members of the population are selected by a specific time or interval?

• Systematic Random Sample
• Convenience Sample
• Simple Random Sample
• Voluntary Response Sample