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Directions: Solve each problem and if necessary round final solutions to 4 decimal places. A) Middle...

Directions: Solve each problem and if necessary round final solutions to 4 decimal places.

A) Middle school children spend an average of 25 hours per week being physically active. Assuming the variable is normal and the standard deviation is 3 hours, what's the probability the mean of a group of 20 children will be higher than 26.3 hours per week?

B) If n = 10 and p = 0.5 in the binomial distribution, then what is the probability of X = exactly 6?

C) If n = 10 and p = 0.5 in the binomial distribution, then what is the probability of X = exactly 6 using Normal Approximation?

Math   Statistics-And-Probability   
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