sample contains 100 observations, X, drawn from a distribution that is

n(?,1). Use Excel and your own computations to calculate:

? P(24.9 ? ? ? 25.1) based only on observations 1 through 50; and

? P(24.9 ? ? ? 25.1) based on all 100 observations.

You can use Excel to compute the sample means based on the above three samples.