Question: hello can someone help me with question 20 please Suppose nine items are randomly sampled from a normally distributed population with a mean of 100

hello

can someone help me with question 20 please

Suppose nine items are randomly sampled from a normally distributed population with a mean of 100 and a standard deviation of 20. The nine randomly sampled values are:
125 95 66 116 99
91 102 51 110

Calculate the probability of getting a sample mean that is smaller than the sample mean for these nine sampled values

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