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PercentFrequency91-10540.088106-12050.1010121-135110.2222136-150180.3636151-16590.1818166-18030.066Total501.00100c.Proportion $135,000 or less: 20/50.d.Percentagemore than$150,000: 24%
24e.19. a/b.NumberFrequencyRelative Frequency140 - 14920.10150 - 15970.35160 - 16930.15170 - 17960.30180 - 18910.05190 - 19910.05Totals201.00c/d.NumberCumulative FrequencyCumulative Relative FrequencyLess than or equal to 14920.10Less than or equal to 15990.45Less than or equal to 169120.60Less than or equal to 179180.90Less than or equal to 189190.95Less than or equal to 199201.000246810121416182091-105106-120121-135136-150151-165166-180Salary ($1000s)Frequency
e.5101520140160180200Frequency20.a.The percentage of people 34 or less is 20.0 + 5.7 + 9.6 + 13.6 = 48.9.b.The percentage of the population over 34 years old is16.3 + 13.5 + 8.7 + 12.6 = 51.1c.The percentage of the population that is between 25 and 54 years old inclusively is13.6 + 16.3 + 13.5 = 43.4d.The percentage less than 25 years old is 20.0 + 5.7 + 9.6 = 35.3.So there are (.353)(275) = 97.075 million people less than 25 years old.e.An estimate of the number of retired people is (.5)(.087)(275) + (.126)(275) = 46.6125 million.21. a/b.ComputerUsage (Hours)FrequencyRelativeFrequency0.0-2.950.103.0-5.9280.566.0-8.980.169.0-11.960.1212.0-14.930.06Total501.00
26c.0510152025300.0 - 2.93.0 - 5.96.0 - 8.99.0 - 11.912.0 - 14.9Computer Usage (Hours)Frequencyd.103035020400Computer Usage (Hours)Frequency69121560e.The majority of the computer users are in the 3 to 6 hour range.Usage is somewhat skewed towardthe right with 3 users in the 12 to 15 hour range.
22.5786458702255688023523.Leaf Unit = 0.1637557813489361004511324.Leaf Unit = 10116120213067142271551602817023
2825.98910246611457889122457131214415126.Leaf Unit = 0.10478991129200135568349485671
yxABC5112021012185131230Total12Totalb.yxABC100.084.616.710.015.483.32100.0100.0100.0Totalc.yxABC27.861.111.1100.00.016.783.3100.012Totald.Category A values for x are always associated with category 1 values for y.Category B values for xare usually associated with category 1 values for y.Category C values for x are usually associatedwith category 2 values for y.30. a.
32-40-24-88244056-40-30-20-10010203040xyb.There is a negative relationship betweenxandy; ydecreases asxincreases.31.Meal Price ($)Quality Rating10-1920-2930-3940-49Good53.822.214.171.124Very Good43.654.260.521.4Excellent2.611.936.878.6Total100.0100.0100.0100.0As the meal price goes up, the percentage of high quality ratings goes up.A positive relationshipbetween meal price and quality is observed.32. a.EPS RatingSales/Margins/ROE0-1920-3940-5960-7980-100TotalA189B145212C11237D3115E213Total44691336b.EPS RatingSales/Margins/ROE0-1920-3940-5960-7980-100