Mathematics, 15.04.2020 22:21 tot92
The breaking strengths of cables produced by a certain manufacturer have a mean µ, of 1850 pounds, and a standard deviation of 90 pounds. It is claimed that an improvement in the manufacturing process has increased the mean breaking strength. To evaluate this claim, 21 newly manufactured cables are randomly chosen and tested, and their mean breaking strength is found to be 1893 pounds. Assume that the population is normally distributed. Can we support, at the 0.05 level of significance, the claim that the mean breaking strength has increased? (Assume that the standard deviation has not changed). Carry your intermediate computations to at least three decimal places.
Answers: 2
Mathematics, 22.06.2019 00:10
Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?
Answers: 2
Mathematics, 22.06.2019 01:30
Fill in the missing exponents in each box and show how you found the answer. (4 points: 2 points for each correct answer with work shown) c. (9^4)^? =9^1 d.(5^? )^3=5^1 *question marks represent the boxes
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Mathematics, 22.06.2019 03:30
Paul needs to buy 5/8 pound of peanuts. measure a pound into sixteenths. what measure is equivalent to 5/8 pound
Answers: 1
Mathematics, 22.06.2019 04:00
Which of the following lines would not have its equation change after a dilation with a center at the origin? (1) y=x+3 (2) y=10 (3) y=4x (4) x=6
Answers: 2
The breaking strengths of cables produced by a certain manufacturer have a mean µ, of 1850 pounds, a...
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