Sampling and Estimation

One way to control sampling risk is to increase sample size

• True

• False

There are three phases in both statistical and nonstatistical sampling. The first phase is to

• generate random numbers for the sample

• evaluate the results

• plan the sample

• select the sample

Which of the following is not a phase in the planning of both statistical and nonstatistical sampling?

• Plan the sample

• Determine the probability that fraud has occurred

• Select the sample and perform the tests

• Evaluate the results

28% of all Woodrow students believe Monday will be snow day. You take a sample of 50 students and find that 15 of them believe Monday will be a snow day. What does 50 represent? 

• n
• P
• phat
• standard deviation

What happens to the shape of a sampling distribution of sample means as n increases?

• It becomes narrower and bimodal.
• It becomes narrower and more normal.
• It becomes wider and skewed right. 
• It becomes wider and more normal. 

These symbols represent the mean and standard deviation for which of the following distributions?

• The Population
• The Sample
• The Sampling Distribution

What sampling method are you using if you survey every 5th person who enters the room.

• Convenience

• Systematic

• Simple Random

What sampling method are you using if you survey the students in the school whose names are picked out of a hat?

• Convenience

• Systematic

• Simple Random

Surveying the students in one home room is an example of which type of sampling method?

• Convenience

• Systematic

• Simple Random

You assign the students in your class a number and choose 6 numbers from a basket. What sampling method are you using?

• Convenience

• Systematic

• Simple Random