STAT 25 -Chapter I Quiz

What is Quantitative Data?

• Consist of attributes, labels, or nonnumerical entries.

• Consist of numerical measurements or counts.

• Consist of a subset of the population.

• None of these

A survey conducted among 1017 men and women by Opinion Research Corporation International found that 76% of women and 60% of men had had a physical examination within the previous year.

Identify the inferential aspect of the survey.

• ...among 1017 men and women, it was found that 76% of women and 60% of men had had a physical examination withing the previous year.

• A survey.

• It is estimated that 76% of women and 60% of men in the country have had a physical examination within the previous year.

• None of these

The Philippines government conducts a survey of high school seniors concerning their plans for future education and employment. One question asks whether they are planning to attend a four-year college or university in the following year. Fifty percent answer yes to this question; that fifty percent is a:

• parameter

• statistics

• variable

• data

Imagine that the Philippine government had the means to survey all high school seniors in the Philippines concerning their plans for future education and employment, and found that 50 percent were planning to attend a 4-year college or university in the following year. This 50 percent is an example of a:

• Parameter

• Statistics

• Variable

• Data

The average yearly salary of a random sample of 150 minor league baseball players is $102,000. Therefore, the average yearly salary of all minor league baseball players is $102,000. Is an example of

• Descriptive Statistics

• Parameter

• Statistics

• Inferential Statistics

To determine the average GPA of 500 students who just finished their first year in college, a group of 60 students is randomly selected. It is determined that the average GPA is 2.85. What is the population of this study?

• 500 students who just finished their first year in college

• A group of 60 students

• 2.85

• None of these

The following data set provides information about five college professors. Which of the following is a qualitative variable and an example of ordinal measurement

• Name

• Specialty

• # of years of teaching

• Rank

Which level of measurement is used to measure the national debt?

• nominal

• ordinal

• interval

• ratio

Which level of measurement would you use to count the hairs on this man's head?

• nominal

• ordinal

• interval

• ratio

In 2006, major league baseball teams spent a total of $2,326,706,685 on players’ salaries. Does this numerical value describe a population parameter or a sample statistic?

• As it refers to some MLB teams (sample), this is a statistic.

• As it refers to some MLB teams (sample), this is a parameter.

• As it refers to (all) MLB teams (population), this is a statistic.

• As it refers to (all) MLB teams (population), this is a parameter.