Question: can you explain how to excel practice problem :5.4 total cholesterol in children age 10-15 yrs is assumed to follow normal distribution with a mean

can you explain how to excel practice problem :5.4

total cholesterol in children age 10-15 yrs is assumed to follow normal distribution with a mean of 191 and SD

of 22.4

1. What is the 90th percentile of cholesterol levels?

2what proportion of children 10-15 yrs of age would classified as hyperlipidemia( cholesterol above 200)

3.what proportion of children 10-15 yrs of age have cholesterol between 180-190?

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