Researchers are interested in the effect of distractions on work efficiency. Forty college students volunteered to be part of an experiment in which half were randomly assigned to a quiet room and the other half to a room in which loud music was playing. The students were asked to complete an easy Sudoku puzzle and their completion times were recorded. A 95% confidence interval for the difference between mean completion times for the puzzle, music-no music, was found to be (5,11) minutes. Could this information be used to conclude that we should reject a null hypothesis of no difference in the average completion time between these two groups at a significance level of 0.05? A. Yes, because the confidence interval contains zero.
B. Yes, because the confidence interval does not include zero.
C. No, there is no relationship between confidence intervals and hypothesis tests.
D. No, this was not a properly designed experiment.

Kathleen's gross annual salary is $56,820. what is the maximum amount of rent she can afford to pay? round your answer to the nearest dollar. question 1 options: $1146 $1326 $1656 $2368

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.