Please help will mark brainliest The data set, {81, 87, 71, 89}, represents Ken's test scores for the first four tests of the semester. Ken scored an 85 on the fifth test.

What impact does the 85 have on the mean test score?

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Need now 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.