"Suppose we have a simple random sample comprised of thefollowing data: 12, 46, 22, 21, 7. What is the point estimate ofthe population standard deviation?"
| | 15.01 |
| | 21 |
| | 21.6 |
| | None of the above |
Lots of things impact sampling error. Which one of the followingdoes not?
| | the variability of the population. |
| | the expected value of the sample statistic |
| | the sample size. |
| | the sampling method used. |
"Given the information provided, what is the probability ofobtaining a sample mean within +/- 2 of the population mean?Population information: mean = 425, and standard deviation = 25.Sample size is 210."
| | 0.9332. |
| | 0.123. |
| | 0.754. |
| | 0.877. |
A sample size of 95 is selected from a population with theproportion equal to 0.41. The sample proportion has an expectedvalue of __ and standard deviation of __.
| | 0.41 and .0505 |
| | 0.41 and 0.41 |
| | 41 and 0.0505 |
| | 41 and 0.41 |
The CEO of Snapchat thinks that 65% of users are under the ageof 25. A simple random sample of 70 users will be used to estimatethe proportion of those under the age of 25. What is theprobability the sample proportion will be between 0.6286 and0.6714?
