Mathematics, 30.03.2021 04:20 jerrygentry3411
4. A factory manufactures treadmills and has a warranty of 5 years on their products. An engineer at
the factory believes that the treadmills do not last that long and will malfunction in less than 5 years.
He tests a sample of 40 treadmills and find the average time to be 4.8 years with a standard deviation
of 0.50. (5 points)
a. State the null and alternative hypotheses
b. At the 95% confidence level, is there enough evidence to support the engineer's claim?
Answers: 1
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Algebraically prove that a clockwise and counterclockwise rotation of 180° about the origin for triangle abc are equivalent rotations.
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Alex buys a home for $276,400. his home is predicted to increase in value 3.5% each year. what is the predicted value of alex’s home in 25 years? a. 621,357 b. 635,191 c. 653,201 d. 673,415
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Mathematics, 22.06.2019 05:00
Stephanie runs three days a week. she ran 3 2/3 miles on monday , 4 1/5 miles on wednesday , and 2 2/9 miles on friday. how many miles did she run this week ?
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4. A factory manufactures treadmills and has a warranty of 5 years on their products. An engineer at...
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