A sample of 25 undergraduates reported the following dollar amounts of entertain
ID: 3020474 • Letter: A
Question
A sample of 25 undergraduates reported the following dollar amounts of entertainment expenses last year: 741 754 771 773 680 682 728 775 708 700 714 731 756 699 772 683 778 739 769 713 746 758 710 771 696 Picture Click here for the Excel Data File a. Find the mean, median and mode of this information. (Round your answers to 2 decimal places.) Mean $ Median $ Mode b. What are the range and standard deviation? (Round your answers to 2 decimal places.) Range $ Standard deviation $ c. Use the Empirical Rule to establish an interval which includes about 95 percent of the observations. (Round your answers to 2 decimal places.) The interval is from $ up to $ .
Explanation / Answer
a) Mean = $ 733.88
Median =$ 739
Mode = $ 771
b) Range = $ 98
Standard Deviation = $ 33.17
c) The interval is from $ 719.93 to $747.83
Refer the following excel table
Column1 Mean 733.88 Standard Error 6.63408371 Median 739 Mode 771 Standard Deviation 33.17041855 Sample Variance 1100.276667 Kurtosis -1.40162912 Skewness -0.198582129 Range 98 Minimum 680 Maximum 778 Sum 18347 Count 25