Researchers are concemed about the impact of students working while they are enrolled in classes, and they would like to know if students work too much and therefore are spending less time on their classes than they hould be. First, the researchers need to find out, on average, how many hours a week students are working. A survey of 50 students provides a sample mean of 7.1 hours worked with the standard deviation of 5 hours. What is a 95% confidence interval based on this sample? Fill in Multiple Blanks Do calculations in Excel. Do not round intermediate calculations. Round your final answer to the nearest tenth, that is, show one (1) digit to the right of the decimal point, for example, 1.0, 1.2. Apply the appropriate round rule if necessary. You can use the "Format Cells." option in Excel to show the required number of decimal places (Excel will automatically round the number up or down). Do not show any symbols or words in your answ The 95% confidence interval for the number of hours worked is from hours to hours.

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