Mathematics, 30.03.2020 23:57, jadbaubl1449
Specifications for a small engine call for a mean air flow,μ, through the engine (at 5000 revolutions per minute) of more than 160 liters per minute. The engine maker’s engineers are investigating whether or not the day’s production of the engine meets this specification. A random sample of engines is selected and their air flows over one minute are measured, with these results (in liters per minute): 159.7, 161.9,164.7, 159.2, 161.3, 161.8, 162.9, 161, 158.5, 161.2. A normal probability plot looks reasonably straight. We will assume that these air flows are normally distributed.
a) Run a hypothesis test of H0:μ= 160 vs. HA: μ >160 at significance levelα= 0.05.
(b) What does the test say about whether the day’s engines meet this specification?
(c) Find an appropriate 95% confidence interval for μ.
(d) Can you directly compare the hypothesis test result and a two tailed confidence interval?
Answers: 2
Mathematics, 21.06.2019 16:10, rajene9302
On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius
Answers: 2
Mathematics, 21.06.2019 21:30, ayoismeisalex
Taylor wants to paint his rectangular deck that is 41 feet long and 24 feet wide. a gallon of paint covers about 350 square feet. how many gallons of paint will taylor need to cover the entire deck? round your answers to two decimal places when necessary.
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Specifications for a small engine call for a mean air flow,μ, through the engine (at 5000 revolution...
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