subject
Mathematics, 08.11.2019 03:31 eternity88091

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. what are the appropriate null and alternative hypotheses to test the manufacturer's claim?

ansver
Answers: 2

Another question on Mathematics

question
Mathematics, 21.06.2019 14:30
What is the volume of this square pyramid?
Answers: 2
question
Mathematics, 21.06.2019 21:30
Which equation shows the variable terms isolated on one side and the constant terms isolated on the other side for the equation -1/2x+3=4-1/4x? a. -1/4x=1 b. -3/4x=1 c. 7=1/4x d. 7=3/4x
Answers: 1
question
Mathematics, 21.06.2019 23:10
Which expression is equivalent to -12(3x-3/4)
Answers: 2
question
Mathematics, 22.06.2019 01:30
Acompany that makes? hair-care products had 5000 people try a new shampoo. of the 5000 ? people, 35 had a mild allergic reaction. what percent of the people had a mild allergic? reaction?
Answers: 2
You know the right answer?
It is known that driving can be difficult in regions where winter conditions involve snow-covered ro...
Questions