Mathematics
Mathematics, 03.07.2019 04:30, TVASALLO31

Aquality control expert at life batteries wants to test their new batteries. the design engineer claims they have a variance of 5929 with a mean life of 941 minutes. if the claim is true, in a sample of 109 batteries, what is the probability that the mean battery life would be greater than 948.8 minutes? round your answer to four decimal places.

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Mathematics, 23.07.2019 16:30, llllllllllllllkkk
Aquality control expert at life batteries wants to test their new batteries. the design engineer claims they have a standard deviation of 92 minutes with a mean life of 1196 minutes. if the claim is true, in a sample of 171 batteries, what is the probability that the mean battery life would be greater than 1179.6 minutes? round your answer to four decimal places.
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Mathematics, 10.10.2019 19:30, 2000samantha
Aquality control researcher at an electronics company is testing the life of the company’s batteries in a certain camera. the researcher selects 100 batteries at random from the daily output of the batteries and finds that the life of the batteries has a mean of 342 pictures with an associated margin of error of 18 pictures. which of the following is the most appropriate conclusion based on these data? a. all the batteries produced by the company that day have a life between 324 and 360 pictures. b. all the batteries ever produced by the company have a life between 324 and 360 pictures. c. it is plausible that mean life of batteries produced by the company that day is between 324 and 360 pictures. d. it is plausible that the mean life of all the batteries ever produced by the company is between 324 and 360 pictures.
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Mathematics, 19.10.2019 06:30, kendasinjab
Amanufacturer of flashlight batteries took a sample of 13 batteries from a day’s production and used them continuously until they failed to work. the life lengths of the batteries, in hours, until they failed were: 342, 426, 317, 545, 264, 451, 1049, 631, 512, 266, 492, 562, and 298. at the .05 level of significance, is there evidence to suggest that the mean life length of the batteries produced by this manufacturer is more than 400 hours? a. yes, because the test value 1.257 is less than the critical value 1.782 b. no, because the test value 1.257 is greater than the critical value 1.115 c. no, because the p-value for this test is equal to .1164 d. yes, because the test value 1.257 is less than the critical value 2.179 reset selection
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Engineering, 02.11.2019 05:31, avi49
Batteries produced by a manufacturing company have had a life expectancy of 135 hours. because of an improved production process, the company believes that there has been an increase in the life expectancy of its batteries. a sample of 42 batteries showed an average life of 140 hours. from past information it is known the standard deviation of the population is 24 hours. test to determine whether there has been an increase in the life expectancy of batteries. what is the test statistic and what conclusion can be made at the.10 level of significance?
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