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Answer:
Standard error = 0.83
Step-by-step explanation:
Given that the heights in inches of males in the united states are believed to be approximately normally distributed with mean u
Sample mean for 25 adults randomly taken =
inches
Std deviation of sample s = inches
Since X the height of males is Normal we find that the sample mean also will follow a normal distribution.
By central limit theorem, mean of x would be= sample mean= 69.72
Std error =
Standard error of the mean = std dev/square root of sample size.
Here only sample std deviation is known
So we used it
Standard error = 0.83