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According to a recent poll cholesterol levels in healthy adults are right skewed with a mean...

According to a recent poll cholesterol levels in healthy adults are right skewed with a mean of 209 mg/dL and a standard deviation of 35 mg/dL. A random sample of 42 healthy adults is selected. Describe the sampling distribution of the sample mean cholesterol level for the sample of 42 adults.

a.

X̄ ~ N(209, 5.4006)
b.

X̄ ~ N(209, 35)
c.

X̄ ~ AN(209, 5.4006)
d.

X̄ ~ AN(209, 35)
Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Solution :

Given that ,

mean = = 209

standard deviation = = 35

n = 42

sample distribution of sample mean is ,

=

= 209

sampling distribution of standard deviation

=  / n = 35/ 42

= 5.4006

a.

X̄ ~ N(209, 5.4006)
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