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There is an old belief that red cars get pulled over for speeding more frequently than cars of other colors. To test whether in fact there is any difference in speeding (as opposed to just biased enforcement), a random sample of red cars and non-red cars are clocked by radar in a 55 mph zone.
Red cars
Non-red cars
N
25
60
Mean
62.8
59.6
Standard deviation
5.1
4.2
question 1a busy landscaping supplies company sells wood chips for garden mulch. the mulch is sold by the cubic metre
Collect a real data set consisting of a sample of at least forty observations
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Consider the following two functions; f(x) = 2x +1; valid for all values of x. h(x) = x -
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Researchers compared urinary bacteria levels of elderly women who drank 10 ounces of a juice drink containing cranberry juice each day to elderly women who consumed the same amount of a look-alike drink without cranberry juice (indistinguishable in t..
The average revenue per retail user
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