Which of the Following Yields a Simple Random Sample

question 135

Multiple Choice

Which of the following yields a simple random sample?

• A)All students in a class are grouped according to their gender.A random sample of 8 is selected from the males and a separate random sample of 7 is drawn from the females.
• B)The best 15 students,according to the opinion of the instructor,in a class are selected.
• C)The names of 50 students in a class are written on 50 different pieces of paper and put in a hat.The first 15 pieces of paper are selected blindly one at a time after shuffling the papers thoroughly and each of the selected pieces is placed back into the hat before the next piece is selected.
• D)All students in a class are divided into groups according to the rows that they are seated.One of the groups is randomly selected.

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Definitions:

Positively Sloped

A line or curve on a graph that moves upward and to the right, indicating a direct relationship between two variables.

Negatively Sloped

Describes a line on a graph that moves downward from left to right, indicating an inverse relationship between two variables.

Total Surplus

The sum of consumer surplus and producer surplus, representing the total benefits to society from the trade of a good or service.

Consumer Surplus

The difference between the maximum price consumers are willing to pay for a good or service and the actual price they pay.