Mathematics, 12.11.2019 23:31 kbrook12
Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.
a)determine margin of error for this 95% confidence interval.
b)input the lower bound. (round to three decimal places)
c)input the upper bound. (round to three decimal places)
Answers: 2
Mathematics, 21.06.2019 20:00, nails4life324
Ana drinks chocolate milk out of glasses that each holdof a liter. she has of a liter of chocolate milk in her refrigerator. 10 how many glasses of chocolate milk can she pour?
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Mathematics, 22.06.2019 00:00, crazylogic963
Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?
Answers: 3
Mathematics, 22.06.2019 01:30, musfirahkhurram
Sara is flying a kite at the park. the angle of elevation from sara to kite in the sky is 53° and the length of the string is 32 feet. of sara is 5 feet tall how far off the ground is the kite
Answers: 1
Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs t...
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