Answer : Given,
Variance () = 400
=> = (20)^2
=> (population standard deviation) = 20.
/root over n = 20 / root over 16 = 20 / 4 [ As n = 16]
Now,
P-value = (Sample mean - ) ÷ ( /root over n )
=> P-value = (70 - 80) ÷ (20/4) = (-10) ÷ 5 = -2
Therefore, p-value is -2.
A random sample is obtained from a population with variance = 400 and the sample mean...
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