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

To test a claim about a mean, when the population standard deviation is unknown we use:

• z procedures
• Pythagorean Theorem
• t procedures
• np > 10 and n(1-p) > 10

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

The table shows the different types of engineers and the subject they liked most.  What percentage of people surveyed were chemical engineers who preferred math?

• 16.5%
• 33.1%
• 17.6%
• 15.5%

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

What percentage of the days that it rained, did they forecast no rain?

• About 20%
• About 18%
• About 14%
• About 12%

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

Identify the join relative frequency of boys that have blond hair.

• .4
• 0.1
• 0.44
• 0.2

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

In a recent survey of 1503 adults in the United States, 53% said they use both a landline and a cell phone,

• parameter
• statistic

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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

In a recent poll of 803 randomly selected baseball fans in Connecticut, 44% said their favorite team was the Yankees. If researchers wanted to reduce the margin of error to at most 2%, how many baseball fans do they have to randomly select? 

• 1564
• 2367
• 803
• 3170

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

For a sample, the 95% confidence interval is (0.202, 0.482).

What is the margin of error of this sample?

• 0.28

• 0.14

• 0.342

• 0.684

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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