Let x.bar = Mean weights of medium-size potato chips (ounces)

x.bar~ N((x.bar)=10.2,SE (x.bar )=0.12/sqrt(3))

What's the probability that the mean weight of the 3 bags is below 10 ounces?

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Assume the cholesterol levels of adult American women can be described by a Normal model with a mean of 188 mg/dL and a standard deviation of 24 mg/dL.

Let x = cholesterol levels of adult American women(mg/dL)

x~N(=188,=24)

Estimate the IQR of the cholesterol levels. if possible R code please