Question 1

What method is used to sample a population so that it is representative of the population
A)samples are chosen at random from the population
B)every other element in a population is chosen
C)all but the observations that have the lowest and highest values are selected
D)only the first half of a population is selected

Accepted Answer

Random sampling is used to ensure that every member of the population has an equal chance of being selected, making the sample representative of the population.

Question 2

An insurance agent earns a commission on each policy sold. This person made Rs.3,000 in commissions during one month and concludes that annual compensation will be Rs. 36,000. This is an example of:
A)descriptive statistics
B)inferential statistics
C)secondary data
D)nominal data

Accepted Answer

The insurance agent is using the data from one month to make an inference or prediction about the annual compensation, which is an example of inferential statistics.

Question 3

A student evaluation of teaching effectiveness for a particular course asks students to respond to their level of agreement with several statements according to the scale 1 = Strongly Agree, 2 = Agree, 3 = Neutral, 4 = Disagree, and 5 = Strongly Disagree. The responses indicate what level of measurement?
A)ordinal
B)ratio
C)nominal
D)interval

Accepted Answer

The scale used for the responses (1 = Strongly Agree, 2 = Agree, 3 = Neutral, 4 = Disagree, and 5 = Strongly Disagree) indicates an order or ranking among the options, which is characteristic of ordinal level measurement.

Question 4

A company publishes data on its quarterly earnings for its stockholders to evaluate. Which of the following is true
A)the source is primary for both the company and the stockholders
B)the source is secondary for both the company and the stockholders
C)the source is primary for the company and secondary for the stockholders
D)the source is secondary for the company and primary for the stockholders

Accepted Answer

The company directly creates and publishes the earnings data, making it a primary source for them. For stockholders, this data is received from the company, making it a secondary source as they did not directly create it.

Question 5

If you have a digital weighing machine in your college that only reads in integers, is your weight a discrete variable
A)yes, because the scale reports integers
B)no, because weight is still a continuous variable regardless of the ability to measure it
C)it depends on the accuracy of the scale
D)it depends on your weight

Accepted Answer

Weight is inherently a continuous variable because it can take any value within a range, even if the scale only measures in integers.

Quiz 1: Statistics and Data Analysis: Variables, Measures, and Distributions

What method is used to sample a population so that it is representative of the population

An insurance agent earns a commission on each policy sold. This person made Rs.3,000 in commissions during one month and concludes that annual compensation will be Rs. 36,000. This is an example of:

A company publishes data on its quarterly earnings for its stockholders to evaluate. Which of the following is true

If you have a digital weighing machine in your college that only reads in integers, is your weight a discrete variable