A)Human body temperatures have a mean of 98.20º and a standarddeviation of 0.62º

Question

A)Human body temperatures have a mean of 98.20º and a standarddeviation of 0.62º. An emergency room patient is found to havea temperature of 101º. convert 101º to a z score. Is thattemperature unusually high? What does it suggest?
B) Which isrelatively better: A score of 85 on a psychology test or a score of45 on an economics test? Scores on the psychology test have a meanof 90 and a standard deviation of 10. Scores on the economics testhave a mean of 55 and a standard deviation of 5.
B) Which isrelatively better: A score of 85 on a psychology test or a score of45 on an economics test? Scores on the psychology test have a meanof 90 and a standard deviation of 10. Scores on the economics testhave a mean of 55 and a standard deviation of 5. Which isrelatively better: A score of 85 on a psychology test or a score of45 on an economics test? Scores on the psychology test have a meanof 90 and a standard deviation of 10. Scores on the economics testhave a mean of 55 and a standard deviation of 5.

Explanation / Answer

A )given that the mean body temparature, =98.2                          standard deviation =0.62 if the temperature is 101o, then the correspondingZ is = (101-98.2)/0.62                                                                                   = 4.52 the temperature is very high B)psychology test: mean =90   and standard deviation,=10 then the Z-value for 85 is (85-90)/10 = -0.2 Economics test: mean =55 and 5 then the Z-value for 45 is (45-55)/5 = 2 the probability of getting -0.2 (0.4207) is less than theprobability of getting 2 (0.9772). hence, it is better to get 45 in economics

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