Exercise 4.(10pts)z Score for pulse rates of AdultsAssume thatadultshavepulserates(beatsperminute)withameanof72.9andastandarddeviation of 12.3 (based on data from the National Health Examination).Whenthisexercisequestionwaswritten,theauthor'spulseratewas48.

z=X

(5a)(2.5pts) What is the difference between the author's pulse rate andthemean?

(5b)(2.5pts) How many standard deviations is that [the difference foundinpart(a)?

(5c)(2.5pts)Convertapulserateof48toazscore

(5d)(2.5pts) If we consider usual pulse rates to be those that convert to zscoresbetween-2and2,isapulserateof48usualorunusual?Explainyouranswer