Unit 7 Bias, Population, Sample, Statistic, and Parameter

These symbols represent the mean and standard deviation for which of the following distributions?

• The population

• The Sample

• The Sampling Distribution

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

A sample of data is used to calculate the parameter for a probability model. The calculated value is...

• an estimate of the value of the parameter

• the same for every sample

• the true value of the parameter

A shop offers customers who pay in cash the option of collecting a receipt. In a sample of 125 customers, 72 choose not to take a receipt. What is the sample proportion of customers who forgo a receipt?

• 0.125

• 0.424

• 0.72

• 0.576

When a sample does not accurately represent the population it is a:

• Unbiased Sample

• Biased Sample

Which scenario would produce the least biased results?

• asking athletes at a gym what their favorite television show is

• asking fans at a baseball game who their favorite baseball team is

• asking shoppers at a store where their favorite place to shop is

• asking students in a college library what their favorite college sports team is

A statistic is a number which describes a sample.

• True

• False

Is the following a parameter or a statistic?

The average annual salary for 35 of a company's 1200 accountants is $68,000.

• Parameter

• Statistic

. 

Is the following a parameter or a statistic?

In a survey of a sample of high school students, 43% said that their mother has taught them the most about managing money.

• Parameter

• Statistic

Is the following a parameter or a statistic?

Sixty-two of the 97 passengers aboard the Hindenburg airship survived its explosion.

• Parameter

• Statistic