Mathematics, 13.11.2019 19:31, oh2joy
It is known that driving can be difficult in regions where winter conditions involve snow-covered roads. for cars equipped with all-season tires traveling at 90 kilometers per hour, the mean stopping time in fresh snow is known to be 215 meters, with a standard deviation of σ = 2.5 meters. it is often advocated that automobiles in such areas should be equipped with special tires to compensate for such conditions, especially with respect to stopping distance. a manufacturer of tires made for driving in fresh snow claims that vehicles equipped with their tires have a decreased stopping distance. a study was done using a random sample of nine snow tires from the manufacturer on a snow-covered test track. the tests resulted in a mean stopping distance of = 212.9 meters. using the sample results and assuming that stopping distance is a normally distributed random variable, what is the value of the test statistic?
Answers: 2
Mathematics, 21.06.2019 21:00, kmassarotti
Apiling for a high-rise building is pushed by two bulldozers at exactly the same time. one bulldozer exerts a force of 1250 pounds in a westerly direction. the other bulldozer pushes the piling with a force of 2650 pounds in a northerly direction. what is the direction of the resulting force upon the piling, to the nearest degree? a. 65 n of w b. 25 n of w c. 45 n of w d. 35 n of w
Answers: 1
It is known that driving can be difficult in regions where winter conditions involve snow-covered ro...
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