Probability that a randomly chosen boy at the start

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Reference no: EM131817014

Weights in kilograms of boys at the start of 1st grade are approximately normal with mean 25, standard deviation 5. Use the 68- 95-99.7 Rule to answer the following.

a. Find P(15 < X < 35), the probability that a randomly chosen boy at the start of 1st grade weighs between 15 and 35 kilograms.

b. Find P(X > 20), the probability that a randomly chosen boy at the start of 1st grade weighs under 20 kilograms.

c. The probability is 99.7% that a randomly chosen boy at the start of 1^st grade has a weight between what values, in kilograms?

d. The probability is 0.16 that a randomly chosen boy at the start of 1st grade weighs more than how many kilograms?

Reference no: EM131817014

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