There are 11,200 students enrolled at Cavalier College. The registrar draws a sa
ID: 3043553 • Letter: T
Question
There are 11,200 students enrolled at Cavalier College. The registrar draws a sample of 100 students to question about the online course registration process. He obtains an alphabetical listing of all 11,200 students, numbered from 1 to 11,200, and uses a random number generator to generate 100 random integers between 1 and 11,200. He then surveys the 100 students corresponding to those numbers. (2pts)
A. Simple Random Sampling
B. Stratified Sampling
C. Non-random Sampling
D. None of the Above
A pollster is interested in gauging how a given state’s Governor would perform in his home state if he ran for President. The pollster randomly selects a sample of voters from a list of all eligible voting citizens in that state. Because nearly 75% of the state’s voters claim a party affiliation (e.g. Democrat, Republican), the pollster decides to include approximately 25 non-affiliated voters for every 75 affiliated voters in his sample. (2pts)
A. Simple Random Sampling
B. Stratified Sampling
C. Non-random Sampling
D. None of the Above
A call center manager wants to measure customer fulfillment order time. She estimates the call lengths to be 5.75 minutes with a standard deviation of 7.00 minutes. She want to be +/- 1 percent in her sampling error. At 95% confidence in her results, what should the sample size be? Show your work. (5pts)
Explanation / Answer
A simple random sample is an unbiased surveying technique. Simple random sampling is a basic type of sampling, since it can be a component of other more complex sampling methods. The principle of simple random sampling is that every object has the same probability of being chosen. Here registrar uses a random number generator to generate 100 random integers between 1 and 11,200.
Hence answer is A. Simple Random Sampling
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