Statistical Inference

10% of college students are predicted to travel out the country during spring break.

• Inferential

• Descriptive

It is predicted that the average number of automobiles each household owns will increase next year.

• Inferential

• Descriptive

Which type of statistic is this? Using this product will burn 74% more calories.

• Descriptive

• Inferential

Classify the following as descriptive or inferential statistics.
The average salary of the graduates of the class of 1980 is $32,500.

• Descriptive

• Inferential

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

• parameter

• statistic

A prediction has been made that the chance that a person will be robbed in a certain city is 15%.

• Descriptive Statistics

• Inferential Statistics

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

A school principal wants to see which subject the 845 students in his school liked best.
Which choice best represents a parameter?

• 700 of the 845 students prefer math.

• 100 of the 120 students surveyed prefer math.

• 845 students

• 120 students surveyed

A mayor wanted to see if the people in his town thought he was doing a good job.
Which choice best represents a statistic?

• The percentage of all townspeople who believe the mayor is doing a good job.

• The percentage of townspeople surveyed who believe the mayor is doing a good job.

• All townspeople.

• A random selection of 100 townspeople.