Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase

تمرين 49

History: Florence Nightingale What was the age distribution of nurses in Great Britain at the time of Florence Nightingale Thanks to Florence Nightingale and the British census of 1851, we have the following information (based on data from the classic text Notes on Nursing , by Florence Nightingale) Note: In 1851 there were 25,466 nurses in Great Britatin. Furthermore, Nightingle made a strict distinction between nurses and domestic servants.

(a) Using the age midpoint x and the percent of nurses, do we have a valid probability distribution Explain.
(b) Use a histogram to graph the probability distribution of part (a).
(c) Find the probability that a British nurce selected at random in 1851 was 60 years of age or older.
(d) Compare the expected age of a British nurse contemporary to Florence Nightingle.
(e) Compare the standard deviation for ages of nurses shown in the distribution.