Question

The Centers for Disease Control & Prevention in Maryland reports that the mean weight (in pounds) for adult females aged 20 years and over is µ = 166. Assume that this distribution is normal in shape and the standard deviation = 25. Find the percentage of females who are equal to or below a weight of 110 pounds. Your answer will be the percentile rank, really, of X = 110. Round to the nearest hundredths place if a fraction. [Note, if your calculated value is not identical to one of the values below, but within plus or minus 0.25 of an answer below, assume it’s a rounding error and select the answer that is closest to your calculated value.]

Group of answer choices

1.25

2.24

48.75

98.75

the correct answer is a value not listed in alternatives “a” through “d”

Answer 1