Based on a recent study, the pH level of the arterial cord (one vessel in the umbilical cord) is normally distributed with mean and standard deviation of . Find the percentage of preterm infants who have the following arterial cord pH levels. a. pH levels between and . b. pH levels over .

In a probability experiment, karen flipped a coin 76 times. the coin landed on heads 32 times. what percentage of the coin flips resulted in tails? round to the nearest percent. a. 58% b. 65% c. 42% d. 60%

Needmax 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.

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =