Hypothesis Testing Cholesterol in Children

# Hypothesis Testing Cholesterol in Children - Hypothesis...

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Hypothesis Testing Cholesterol in Children The Idea of Hypothesis Testing Suppose we want to show that only children have an average higher cholesterol level than the national average. It is known that the mean cholesterol level for all Americans is 190. Construct the relevant hypothesis test: H 0 : μ = 190 H 1 : μ > 190 We test 100 only children and find that x = 198 and s = 15. Do we have evidence to suggest that only children have an average higher cholesterol level than the national average? We have z is called the test statistic . Since z is so high, the probability that Ho is true is so small that we decide to reject H 0 and accept H 1 . Therefore, we can conclude that only children have a higher cholesterol level on the average then the national average. Rejection Regions

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Suppose that α = .05. We can draw the appropriate picture and find the z score for -.025 and .025. We call the outside regions the rejection regions. We call the blue areas the
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Hypothesis Testing Cholesterol in Children - Hypothesis...

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