PLEASE HELP IM TIMED!!!!!!!!
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Answer:
The answer is below
Step-by-step explanation:
a) Given that the number of sample (n) = 300, therefore since n > 30, the distribution of the sample means is going to be normally distributed.
b) The mean of the distribution of sample means (also known as the Expected value of M) is equal to the population mean μ.
c) The standard deviation of the distribution of sample means is called the Standard Error of M, it is given by:
So firstly, multiply both sides by 4 (the reciprocal of 1/4):
Next, subtract both sides by 2 and your answer will be: