Mathematics, 22.04.2021 17:40 Alex4530
An engineer has designed a valve that will regulate water pressure on an automobile engine. The engineer designed the valve such that it would produce a mean pressure of 6.9 pounds/square inch. The valve was tested on 26 engines and the mean pressure was 6.6 pounds/square inch with a standard deviation of 0.6. Is there evidence at the 0.05 level that the valve performs below the specifications? Assume the population distribution is approximately normal. Step 1 of 5: State the null and alternative hypotheses.
Answers: 2
Mathematics, 21.06.2019 19:30
Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?
Answers: 2
Mathematics, 21.06.2019 19:50
Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27
Answers: 1
Mathematics, 22.06.2019 02:00
Light travels at 186,000 miles per second. light takes about 1 1? 3 seconds to travel from the earth to the moon. calculate the distance between the earth and the moon based on the speed of light.
Answers: 2
An engineer has designed a valve that will regulate water pressure on an automobile engine. The engi...
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