Sheila\'s doctor is concerned that she may suffer from gestational diabetes (hig

Question

Sheila's doctor is concerned that she may suffer from gestational diabetes (high blood glucose levels during pregnancy). There is variation both in the actual glucose level and in the blood test that measures the level. A patient is classified as having gestational diabetes if the glucose level is above 140 milligrams per deciliter (mg/dl) one hour after a sugary drink is ingested. Sheila's measured glucose level one hour after ingesting the sugary drink varies according to the Normal distribution with = 129 mg/dl and = 10 mg/dl.

(b) If measurements are made instead on 3 separate days and the mean result is compared with the criterion 140 mg/dl, what is the probability that Sheila is diagnosed as having gestational diabetes? (Round your answer to four decimal places.) Incorrect: Your answer is incorrect.

Explanation / Answer

b)here for sample size n=3; std error of mean =std deviation/(n)1/2 =10/(3)1/2 =5.7735

therefore probability that Sheila is diagnosed as having gestational diabetes =P(X>140)

=1-P(X<140)=1-P(Z<(140-129)/5.7735)=1-P(Z<1.9053)=1-0.9716=0.0284

please revert for any clarificaiton required

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