Unit 5 Quiz Review

Before a nation wide election, a polling place was trying to see who would win.

Which choice best represents a statistic?

• A selection of voters over age 50.

• All voters.

• The percentage of voters in favor of the candidate.

• 53% of the selection of voters support the candidate.

A survey company was trying to see if people in a state thought the pollution was too high.
Which choice best represents a parameter?

• All people in the state.
• Percentage of all people in the state who thought the pollution was too high.
• 500 randomly selected residents of the state.
• 71% of the residents surveyed thought the pollution was too high.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

A musician wanted to see what people who bought his last album thought about the songs.
Which choice best represents a parameter?

• The percentage of all people who bought his last album that thought the songs were good.
• 50 people who bought the musician's last album
• 85% of the 50 people surveyed thought the songs were good.
• All 

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

A beverage company wanted to see if people in the United States liked their new logo. Which choice best represents a population?

• A selection of logo artists.

• Every person in the United States.

• A selection of shoppers from different states.

• 3,800 children age 5 - 15

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

At a particular college, 78% of all students are receiving some kind of financial aid.The school newspaper selects a random sample of 100 students and 72% of the respondents say they are receiving some sort of financial aid. Which of the following is true?

•  78% is a population and 72% is a sample.
• 72% is a population and 78% is a sample
• 78% is a parameter and 72% is a statistic
• 72% is a parameter and 78% is a statistic

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

The population parameter is 27.64, the IQR. 1000 SRSs of size n = 10 were selected from the population described. The sample IQR for each of these samples was recorded on the dotplot. The center of the sampling distribution is indicated by an orange line segment. Does the sample IQR appear to be an unbiased estimator of the population IQR? Explain your reasoning.

• Yes, the mean of the sampling distribution is very close to 27.64, the value of the population IQR.

• Yes, the mean of the sampling distribution is clearly less than 27.64, the value of the population IQR.

• No, the mean of the sampling distribution is very close to 27.64, the value of the population IQR.

• No, the mean of the sampling distribution is clearly less than 27.64, the value of the population IQR.

Which best describes the sampling distribution shown below? (p = population parameter and Mp = center of sample)

• Unbiased Estimator

• Biased Estimator

Which best describes the sampling distribution shown below.

• Unbiased Estimator

• Biased Estimator

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

CCSS.HSS.IC.B.5

The histograms show the results of three sampling distributions of a sample mean. For each graph, 1,500 samples of size n were selected from the same population and the sample mean was recorded. The value of n, the sample size, was different for each of the three simulations.

Which of the following is the correct ordering of the graphs from SMALLEST sample size n to LARGEST sample size n ?

• A, C, B

• B, A, C

• B, C, A

• C, A, B

• C, B, A

Given a box of 1000 marbles that is 28% red, if I randomly select 36 marbles, have I drawn a large enough sample to use the normal distribution?

• No, because $np<10$

• Yes, because $np\ge10\ and\ n\left(1-p\right)\ge10$

• no, becuase $n\left(1-p\right)\ge10$