Question

44. All of the following techniques are acceptable ad hoc procedures to conduct after an ANOVA has been fit, EXCEPT: *
(A) Tukey
(B) Kolmogorov-Smirnoff
(C) Scheffe
(D) LSD

45. Monthly rent was determined for each apartment in a random sample of 250 apartments. The sample mean was $940 and the sample standard deviation was $55. An approximate 95 percent confidence interval for the true mean monthly rent for the population of apartments from which this sample was selected is ($933 , $947) . Which of the following statements is a correct interpretation of the 95 percent confidence level?: *
(A) In this population, about 95 percent of all rental prices are between $933 and $947.
(B) In this sample, about 95 percent of the 100 rental prices are between $933 and $947.
(C) In repeated sampling, the method produces intervals that include the population mean approximately 95 percent of the time.
(D) In repeated sampling, the method produces intervals that include the sample mean approximately 95 percent of the time.
(E) There is a probability of 0.95 that the true mean is between $933 and $947.

46. A small business surveyed all 25 of its employees to determine the proportion who participate in the 401-k retirement program. Which of the following statements is true?: *
(A) The small business did not use a random sample, so the information from the survey will not provide useful information.
(B) The small business should not use the data from this survey because this is an observational study.
(C) The small business would have to use the survey data to construct a confidence interval in order to estimate the proportion of employees who participate in the 401-k program.
(D) The small business does not need to use an inference procedure to determine the proportion of employees who participate in the 401-k program because the survey was a census of all employees.
(E) The small business can use the result of this survey to prove that working for the small business causes employees to participate in the 401-k program.

Answer 1

Answer:

44) (B) Kolmogorov-Smirnoff is correct

45) The 95% confidence interval displays that if same size samples are taken repeatedly from the population under study and find the confidence interval for each sample then about 95% confidence intervals will contain true mean.

(C) In repeated sampling, the method produces intervals that include the population mean approximately 95 percent of the time is correct

46) (D) The small business does not need to use an inference procedure to determine the proportion of employees who participate in the 401-k program because the survey was a census of all employees is correct