Mr flannery's math class averaged poorly on a test, so he gave them a retest. there are 30 students in his class. on the retest, 10 students gained 15 points each, 10 students gained 5 points each, and 10 students lost 5 points each. how does the mean of the retest scores compare to the mean of the scores on the first test? a) the means are the same. b) the mean on the retest is 5 points higher. c) the mean on the retest is 10 points higher. d) the mean on the retest is 15 points higher.

Convert 50 kilogram to pounds. (the conversion factor from kilogram to pound is 2.2046.) a. 52.2 lb. b. 110.2 lb. c. 22.6 lb. d. 47.8 lb.

This is so hard and it’s for a test

Me max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.