I am setting this problem up as P(-2 < (Mn) < 2) and then plugged in the formula for mean and standard deviation. I don't feel like I am headed in the correct direction. Could someone set me straight?
2026-03-27 18:26:09.1774635969
Standard Normal Distribution Problem
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You want to solve for
$$P(|M_n| \ge 2) \le \frac1{100}$$
Note that mean of $M_n=0$,
Hence this reduces to
$$P(M_n \le -2) \le \frac1{200}$$
You might like to find the standard deviation of $M_n$ to proceed with the question.