Unit 5 Quiz Review

Each month, the Current Population Survey interviews a random sample of individuals in about 60,000 U.S. households. One of its goals is to estimate the national unemployment rate. In January 2015, 5.7% of those interviewed were unemployed.

What is the SAMPLE?

• Current Population Survey

• All U.S. Househoulds

• 60,000 U.S. households

• Unemployment Rate

Each month, the Current Population Survey interviews a random sample of individuals in about 60,000 U.S. households. One of its goals is to estimate the national unemployment rate. In January 2015, 5.7% of those interviewed were unemployed.

What is the STATISTIC?

• 5.7% Unemployed

• All U.S. Househoulds

• 60,000 U.S. households

• Unemployment Rate

Each month, the Current Population Survey interviews a random sample of individuals in about 60,000 U.S. households. One of its goals is to estimate the national unemployment rate. In January 2015, 5.7% of those interviewed were unemployed.

What is the POPULATION?

• 5.7% Unemployed

• All U.S. Househoulds

• 60,000 U.S. households

• Unemployment Rate

Each month, the Current Population Survey interviews a random sample of individuals in about 60,000 U.S. households. One of its goals is to estimate the national unemployment rate. In January 2015, 5.7% of those interviewed were unemployed.

What is the PARAMETER?

• 5.7% Unemployed

• All U.S. Househoulds

• 60,000 U.S. households

• Unemployment Rate

On a flight to Orlando 12% of the 200 passengers were selected for random security screening before boarding. According to the Transportation Security Administration, 15% of passengers at this airport are supposed to be chosen for random screening.

Identify the STATISTIC.

• 200 passengers

• All passengers on the flight

• 12% Selected Passengers

• 15% of all passengers

On a flight to Orlando 12% of the 200 passengers were selected for random security screening before boarding. According to the Transportation Security Administration, 15% of passengers at this airport are supposed to be chosen for random screening.

Identify the POPULATION.

• 200 passengers

• All passengers on the flight

• 12% Selected Passengers

• 15% of all passengers

On a flight to Orlando 12% of the 200 passengers were selected for random security screening before boarding. According to the Transportation Security Administration, 15% of passengers at this airport are supposed to be chosen for random screening.

Identify the PARAMETER.

• 200 passengers

• All passengers on the flight

• 12% Selected Passengers

• 15% of all passengers

Given the following information, determine whether the statistic is an unbiased estimator.

A statistics test is graded from 0-100. A sample of 20 students received an average of an 82 while the average for all statistics students was a 70.

• Biased

• Unbiased

Given the following information, determine whether the statistic is an unbiased estimator.

A statistics test is graded from 0-100. A sample of 50 students received an average of an 82 while the average for all statistics students was a 70. If the teacher changed the sample size to 20, what will happen to the variability?

• Less Variability

• More Variability

Given the following information, determine whether the statistic is an unbiased estimator.

A developer is trying to determine the median lot size for a town. Out of the 150 lots in the town, a sample of 24 reveals a median of 4.5 acres. The true median of the lots is 4.1 acres.

• Biased

• Unbiased