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Mathematics, 20.04.2021 20:40 dannaasc5475
we measured breaking distances of 13 four cylinder cars and found a mean of 132.5ft and a std dev of 5.8ft. For 12 six-cylinder cars, the mean was 136.3ft and the std dev was 9.7ft. use a 0.05 significance level, to test the claim that four-cylinder cars have a shorter average breaking distance than six-cylinder cars
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