Use the following information for the next two questions: 1 points to receive their order in minutes. The average fime to receive the order for the 20 customers was 3.5 minutes with a standard deviation of 0.75 minutes. Which of the equations below would be the correct way to determine a 95% confidence interval. a. 3.5±2.093×0.75 b. 0.75±2.093×( 20
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3.5
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) c. 3.5±2.093×( 19
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0.75
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) d. 3.5±2.093×( 20
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0.75
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)