CCSS.Math.Content.HSS.IC.B.4

A September 2011 Gallup survey suggests that 38% of Americans are planning on voting for Barack Obama in the 2012 presidential election. Among a random sample of 100 people, approximately how many would you expect to vote for Obama? 

• 38 people
• 42 people
• 6 people
• Cannot be determined

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CCSS.Math.Content.HSS.IC.B.4

Source of bias that occurs when you ask people who are EASY to ask

• Response Bias
• Convenience Sampling
• Nonresponse
• Voluntary Response

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CCSS.Math.Content.HSS.IC.B.4

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.
She selects the first five who raise their hands.

• Systematic
• Convenience
• Voluntary Response
• Simple Random

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CCSS.Math.Content.HSS.IC.B.4

What portion of Americans admit to having eaten an entire pie by themselves?

• 1 in 2
• 1 in 5
• 1 in 10
• 1 in 19

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CCSS.Math.Content.HSS.IC.B.4

How many total people were surveyed about what ice cream flavor they would pick?

• 107
• 92
• 70
• 269

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CCSS.Math.Content.HSS.IC.B.4

What is the point estimator for the interval (-5 , 13)?

• 10

• 9.5

• 9

• -5

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CCSS.Math.Content.HSS.IC.B.4

Suppose that 25 percent of women and 22 percent of men would answer yes to a particular question. In a simulation, a random sample of 100 women and a random sample of 100 men were selected, and the difference in sample proportions of those who answered yes, was calculated. The process was repeated 1,000 times. Which of the following is most likely to be a representation of the simulated sampling distribution of the difference between the two sample proportions?

• 
• 
• 
• 
• 

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CCSS.Math.Content.HSS.IC.B.4

Two random samples, A and B, were selected from the same population to estimate the population mean. For each sample, the mean, standard deviation, and margin of error for a 95 percent confidence interval for the population mean are shown in the table. Which of the following could explain why the margin of error of sample A is greater than the margin of error of sample B?

• The sample size of A is greater than the sample size of B.

• The sample size of A is less than the sample size of B.

• The sample size of A is equal to the sample size of B.

• The mean of sample A is greater than the mean of sample B.

• The standard deviation of sample A is less than the standard deviation of sample B.

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CCSS.Math.Content.HSS.IC.B.4

What was the relative percent of just 11th graders who liked SqaureBob SpongePants?

• 6%

• 5%

• 2%

• 10%

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CCSS.Math.Content.HSS.IC.B.4

A survey was conducted where 150 high school students were asked the average amount of time they spent doing household chores in one week. The data collected resulted in a mean time of 180.5 minutes with a standard deviation of 5.5 minutes. Which of these represents a 95% confidence interval for the mean weekly hours spent doing household chores of all high school students?

• [171.5, 189.5]

• [175, 186]

• [178.3, 182.8]

• [179.6, 181.4]

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CCSS.Math.Content.HSS.IC.B.4