Mathematics, 29.12.2020 23:30, amw4
The mean running time of a certain variety of nickel-cadmium rechargeable flashlight battery is known to be normally distributed with a mean of 8.5. A change in production method for this battery has been proposed, and a simple random sample of 64 batteries produced by the new method has mean running time of 8.72 hours. Assume the population is normally distributed with a standard deviation of 0.55 hour as known and remains unchanged, test a claim that the new production method improving the battery mean running time using 0.05 significance level.
Answers: 3
Mathematics, 21.06.2019 18:00, purplefish53
Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary
Answers: 2
Mathematics, 22.06.2019 00:20, ridzrana02
Jubal wrote the four equations below. he examined them, without solving them, to determine which equation has no solution. which of jubalβs equations has no solution hurry
Answers: 1
The mean running time of a certain variety of nickel-cadmium rechargeable flashlight battery is know...
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