Exercise 2. The distribution of waiting time until being served at a bank has a mean of 7 minutes and a standard deviation of 9 minutes. Is the distribution of waiting time Normal? Explain why or why not. [Hint: What does the 68-95-99.7 rule say?]

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**Exercise 2.** The distribution of waiting time until being served at a bank has a mean of 7 minutes and a standard deviation of 9 minutes. Is the distribution of waiting time Normal? Explain why or why not. [Hint: What does the 68-95-99.7 rule say?]
Transcribed Image Text:**Exercise 2.** The distribution of waiting time until being served at a bank has a mean of 7 minutes and a standard deviation of 9 minutes. Is the distribution of waiting time Normal? Explain why or why not. [Hint: What does the 68-95-99.7 rule say?]
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