Question

The pulse rates of 169 randomly selected adult males vary from a low of 42 bpm to a high of 122 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 4 bpm of the population mean. Complete parts​ (a) through​ (c) below. a. Find the sample size using the range rule of thumb to estimate sigma. nequals nothing ​(Round up to the nearest whole number as​ needed.) b. Assume that sigmaequals10.2 ​bpm, based on the value sequals10.2 bpm from the sample of 169 male pulse rates. nequals nothing ​(Round up to the nearest whole number as​ needed.) c. Compare the results from parts​ (a) and​ (b). Which result is likely to be​ better? The result from part​ (a) is __ the result from part​ (b). The result from __ ( part (a) or part (b) ) is likely to be better because __ (it is larger.) (it uses a better estimate of sigma) (it is smaller.)

Answer 1