The weights of children age two average 25 pounds with a standard deviation of 4 pounds.How many standard deviations from the mean is a weight of 15 pounds?
A)2.50 standard deviations below the mean
B)1.40 standard deviations above the mean
C)1.40 standard deviations below the mean
D)1.67 standard deviations above the mean
E)2.50 standard deviations above the mean

Question

Quizplus · Accepted Answer

To find how many standard deviations a weight of 15 pounds is from the mean, use the formula: (X - μ) / σ. Here, X = 15, μ = 25, and σ = 4. So, (15 - 25) / 4 = -2.5, which means 15 pounds is 2.50 standard deviations below the mean.

The Weights of Children Age Two Average 25 Pounds with a Standard