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The pulse rates of 143 randomly selected adult males vary from a low of 43 bpm to a high of 103 bpm. Find the

minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 90% confidence

that the sample mean is within 3 bpm of the population mean. Complete parts (a) through (c) below.

CEED

a. Find the sample size using the range rule of thumb to estimate o

n=

(Round up to the nearest whole number as needed.)