Elementary Statistics High School Edition

Calculate the variance of the data set: 2, 4, 4, 4, 5, 5, 7, 9.

• 4

• 2

• 3

• 5

The standard deviation of a dataset is 4. If each data point in the dataset is multiplied by 2, what is the new standard deviation?

• 2

• 4

• 8

• 16

The mean of a data set is 20, and the standard deviation is 5. What is the z-score of a data point that is 25?

• 1

• 5

• 0

• -1

__________ is the science of collecting, organizing, analyzing, and interpreting data in order to make decisions.

• Statistics

• Data

• Population

• Sample

_________ consist of information coming from observations, counts, measurements, or responses.

• Statistics

• Data

• Population

• Sample

Identify the population and the sample:

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

• Population: 1200

  Sample: $68,000

• Population: 35

  Sample: 1200

• Population: 1200

  Sample: 35

• Population: $68,000

  Sample: 1200

Determine whether the numerical value is a parameter or statistic:

A survey of 2514 college board members found that 38% think that higher education costs what it should relative to its value.

• Parameter

• Statistic

Determine whether the numerical value is a parameter or statistic:

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

• Parameter

• Statistic

A poll was conducted in which 1000 adults were asked if they prefer bottled water or tap water, and 57% of them said they prefer bottled water. In this scenario, the 57% is a _____.

• population

• sample

• parameter

• statistic

Suppose a survey of 584 women in the U.S. found that more than 65% are the primary investor in their household. Which part of the survey represents the descriptive branch of statistics?

• There is an association between U.S. women and being the primary investor in their household.

• There is an association between the 584 women and being the primary investor in their household.

• 65% of women in the sample are the primary investor in their household.

• 584 women were surveyed