solution to practice 1

solution to practice 1 - .095 .177 Over 74 .093 .304 b Bar...

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1.6 a. Flip the coin 100 times and count the number of heads and tails b. Outcomes of flips c. Outcomes of the 100 flips d. Proportion of heads e. Proportion of heads in the 100 flips 1.7 a. Most likely unfair b. We can’t conclude it is either unfair or fair. More likely fair. c. Try it yourself. 2.3 a. Interval b. Nominal c. Ordinal d. Interval e. Interval 2.6 a. Interval b. Interval c. Nominal d. Ordinal e. Interval 2.24 a Newspaper Frequency Relative Frequency Daily News 141 .39 Post 128 .36 Times 32 .09 WSJ 59 .16 b Pie Chart Daily News 39% Post 36% Times 9% WSJ 16% The Daily News and the Post dominate the market 2.35a c The histogram is unimodal and somewhat positively skewed. 0 5 10 15 5 10 15 20 25 Defectives Frequency b
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0 1 0 5 10 15 20 25 Defectives Frequency 2.62 Age Group Accident rate (per driver) Fatal accident rate (per 1,000 drivers) Under 20 .373 .643 20 – 24 .173 .352 25 – 34 .209 .305 35- 44 .162 .251 45 – 54 .133 .214 55 – 64 .108 .208 65 – 74
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Unformatted text preview: .095 .177 Over 74 .093 .304 b Bar Chart A A A A A A A A F F F F F F F F 0.000 0.100 0.200 0.300 0.400 0.500 0.600 0.700 Under 20 20-24 25-34 35-44 45-54 55-64 65-74 0ver 74 Age group Rates c The accident rate generally decreases as the ages increase. The fatal accident rate decreases until the over 74 age category where there is an increase. As drivers age they become less likely to be involved in an accident. As a result the fatal accident rate also decreases except for the over 74 age group. Perhaps because of other health issues older drivers are more likely than other drivers to die as a result of the accident. 2.81 There has been a gradual increase over the 18-year period. Line Charts 100 200 300 400 500 1 3 5 7 9 11 13 15 17 19 21 Year Number of degree (1,000s) Male Female Total...
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solution to practice 1 - .095 .177 Over 74 .093 .304 b Bar...

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