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The heights of 500,000 students are approximately normally distributed with a mean of 174.5 centimeters and...

The heights of 500,000 students are approximately normally distributed with a mean of 174.5 centimeters and a standard deviation of 6.9 centimeters. If 200 random samples of size 25 each are drawn from this population and the means are recorded to the nearest tenth of a centimeter,

1.Determine how many sample means that falls between 172.45 and 175.85 centimeters inclusive;

2.Determine how many sample means falls below 171.95 centimeters.

Math   Statistics-And-Probability   
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