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A sample of 25 undergraduates reported the following dollar amounts of entertainment expenses last year. 684...

A sample of 25 undergraduates reported the following dollar amounts of entertainment expenses last year.

684 710 688 711 722 698 723 743 738 722 696 721 685
763 681 731 736 771 693 701 737 717 752 710 697

a) Calculate the standard deviation

b) Find the semi-interquartile range

c) Find the 58th percentile

d) Determine the first decile and the ninth decile.

Math   Statistics-And-Probability   
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