The length of a 4-year-old males upper arm is approximately normally distributed with mean = 21.8
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The length of a 4-year-old male’s upper arm is approximately normally distributed with mean μ = 21.8 cm and standard deviation σ = 2.0 cm.
(a) Draw a normal curve with the parameters labeled.
(b) Shade the region that represents the proportion of 4-year-old males whose upper arm length is less than 20 cm.
(c) Suppose the area under the normal curve to the left of x = 20 cm is 0.1841. Provide two interpretations of this result.
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a b c Interpretation 1 The proportion of 4yearold males whose upper arm leng...View the full answer
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