The time that a shopper spends in the grocery store is normally distributed, with a mean of 45 minutes and a standard deviation of 12 minutes.     1. If a shopper is randomly selected, what is the probability that the time spent in the store is less than 20 minutes? 2. Based on your answer to #1, would you consider it unusual for a shopper to spend only 20 minutes in the grocery store? Why?  3. What time spent cuts off the highest 10% of shopping times?

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.