The average spending at Necos salad bar is 951 with a standa

The average spending at Neco\'s salad bar is $9.51 with a standard deviation of $3.33. The distribution follwos Normal distribution. The management is inersting in the middle 85% of the customers (spending wise) as it believes that they represent the customer base. What will be the difference between the upper and lower spending cut-offs which define the middle 85% of the customers?

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