The Centers for Disease Control & Prevention in Maryland reports that the mean w

Question

The Centers for Disease Control & Prevention in Maryland reports that the mean weight (in pounds) for adult males aged 20 years and over is mu = 195. Assume that this distribution is normal in shape and the standard deviation = 30. Find the z score for a man with a weight of 125 pounds (that is, for X = 125). Round to the nearest tenths place if a fraction. [Note, if your calculated value is not identical to one of the values below, but within plus or minus 0.2 of an answer below, assume its a rounding error and select the answer that is closest to your calculated value. +2.0 2.0 +2.3 -2.3 the correct z score is a value not listed in alternatives "a" through "d" The shape of a given distribution is normal with a mean of 450 and a standard deviation of 60. With these parameters, answer the associated question(s). For these parameters, calculate the raw score (X) corresponding to a z score of z = 2.34. Round to the nearest tenths place if a fraction. The X score is: 478.6 498.3 586.5 590.4 595.8

Explanation / Answer

Question 7

This formula allows you to calculate a z-score

z = X - /

z= 125-195/ 30

z=-2.3

Option D is correct

Question 8

This formula allows you to calculate a X

z = X - /

2.34 = X - 450/60

140.4= X-450

X=140.4+450

X= 590.4

Option D is correct

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