Tips a pizza delivery driver. always trying to increase tips. runs an experiment on his next 40 deliveries. he flips a coin todecide whether or not to call a customer from his mobile phone when he is five minutes away, hoping this slight bump incustomer service will lead to a slight bump in tips. after 40 deliveries, he will compare the average tip percentage betweenthe customers he called and those he did not. what are the experimental units and how did he randomize treatments?

Someone answer asap for ! 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.