The pulse rates of 144 randomly selected adult males vary from a low of 40 bpm to a high of 120 bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 98% condence that the sample mean is within 3 bpm of the population mean. Complete parts (a) through (c) below. 3. Find the sample size using the range rule of thumb to estimate 0'. n = 241 (Round up to the nearest whole number as needed.) b. Assume that o' = 12.1 bpm, based on the value 5 =12.1 bpm from the sample of 144 male pulse rates. n=D (Round up to the nearest whole number as needed.)