Question: 1. A telemarketer makes nine phone calls per half hour and is able to make a sale on 20% of these contacts. During the next

1. A telemarketer makes nine phone calls per half hour and is able to make a sale on 20% of these contacts. During the next 4 hours, find: The mean number of sales in the 4-hour period The standard deviation number of sales in the 4-hour period

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