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

Is there bias? 
A four company wants to know what percent of local households bake at least twice a week. A company representative calls 500 randomly selected households during the daytime. 

• Yes
• No

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

In a survey of 104 students, it was found that 79 went to the homecoming game this year.

A 99% confidence interval for p is (0.652, 0.868). Interpret this interval.

• 99% of the time the true proportion of people who went to the homecoming game this year is between 65.2% and 86.6%.

• The probability that the population proportion of people who went to the homecoming game this year is between 65.2% and 86.6% is 95%.

• Based on this sample, I am 99% confident that the true proportion of people who went to the homecoming game this year is between 65.2% and 86.6%.

• 99% of all possible intervals calculated this way will capture the true proportion of people who went to the homecoming game this year

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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

What percent was 10th graders who liked SqaureBob SpongePants?

• 6%

• 10%

• 50%

• 15%

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

Because of the expense of running a campaign, a potential candidate will only run if there is more than 40% initial support for him. To test this they take a SRS of 200 voters and ask if they would vote for him. They run a significance test with H₀: p = 0.40 vs. H_a: p > 0.40. Which of the following describes a consequence of Type II error in this setting?

• Thinking that there is enough support, but the candidate still decides not to run for office.

• Thinking that there is not enough support, but the candidate still decides to run for office.

• Thinking that there is not enough support, so the candidate decides not to run for office. The candidate saves money, but might have won because the initial support is more than 40%

• Thinking that there is enough support, so the candidate decides to run for office. This is a waste of money because the initial support is not more than 40%.

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

What type of Sampling?

Based on 12,500 responses from 42,000 surveys sent to its alumni, a major university estimated that the annual salary of its alumni was 92,500.

• Random

• Convenience

• Systematic

• Voluntary

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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

A researcher wishes to estimate, within $25, the true mean amount of postage a community college spends each year. The standard deviation is known to be $80. If she wishes to be 95% confident in her estimate of the true mean amount of postage, how large a sample is necessary? Round to the nearest whole number

• 41

• 25

• 80

• 200

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

What is the branch of mathematics dealing with the collection, organization, analysis, interpretation and presentation of data?

• Algebra

• Geometry

• Probability

• Statistics

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