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In a sample of 60 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2. a) Find a 95% confidence interval for the mean efficiency. b) Find a 99.5% confidence interval for the mean efficiency. c) What is the confidence level of …
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In a sample of 70 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2. The 98% lower confidence bound is 84.51. The claim is made that the mean efficiency is greater than 84.629%. With what level of confidence can this statement be made? Express the answer as a percent and round to two decimal places.
In a sample of 60 electric motors, the average efficiency in percent) was 85 and the standard deviation was 2. a. Find a 95% confidence interval for the mean efficiency. b. What is the confidence level of the interval (84.63, 85.37)? c. How many thermostats must be sampled so that a 95% confidence interval-specifies the mean to within +0.35? d.
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In a sample of 60 electric motors, the average efficiency in percent) was 85 and the standard deviation was 2. a. Find a 95% confidence interval for the mean efficiency. b. What is the confidence level of the interval (84.63, 85.37)? c. How many thermostats must be sampled so that a 95% confidence interval specifies the mean to within + 0.35? d.
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Required information In a sample of 50.0 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2. Find a 98% lower confidence bound for the mean efficiency. (Round the final answer to three decimal places.) The 98% lower confidence bound is
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To determine the efficiency of a batch of production of electric motors, 8 motors are tested. The average efficiency of the sample is calculated to be 88.5% and the standard deviation of the sample is 0.5 percentage point. (a) Determine a 95% confidence interval for the mean efficiency of the given batch of motors. (b) If we want to cut the ...
In a sample of 65.0 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2. Section 05.01 Exerclse 08.c - Compute a confldence Interval and find the necessary sample slze What is the confidence level of the interval (84.645, 85.355)? (Round the final answer to three decimal places.) The confidence level is %.
In a sample of 55 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2. a) Find a 95% confidence interval for the mean efficiency. Round the answers to three decimal places. b) Find a 99.5% confidence interval for the mean efficiency. Round the answers to three decimal places.
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Required information In a sample of 65.0 electric motors, the average efficiency (in percent) was 85 and the stanclard deviation was 2 Find a 99.5% confidence interval for the mean efficiency. (Round the final answers to three decimal places) The 99.5% confidence interval is Required information In a sample of 65.0 electric motors, the average efficiency (in percent) was 85 …
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Find a 99.5% confidence interval for the mean efficiency. Round the answers to three decimal places. What is the confidence level of the interval (84.6144, 85.3856)? Express the answer as a percent and round to two decimal places. How many electric motors must be sampled so that a 95% confidence interval specifies the mean to within ±0.31?
To understand how an electric motor works, the key is to understand how the electromagnet works. (See How Electromagnets Work for complete details.) An electromagnet is the basis of an electric motor. Say …
Find step-by-step Statistics solutions and your answer to the following textbook question: In a sample of 60 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2. a. Find a 95% confidence interval for the mean efficiency. b. Find a 99.5% confidence interval for the mean efficiency. c.
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In a sample of 70.0 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2 .What is the confidence level of the interval (84.658,85.342) ? (Round the final answer to three decimal places.)The confidence level is%.
Electrical motors can be brushed or brushless, Electrical motors can be single-phase or three phase. Electrical motors could be air-cooled or liquid-cooled. Electrical motors can be powered by direct current (DC) or …
Required information In a sample of 65 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2. Find a 99.5% confidence interval for the mean efficiency. Round the answers to three decimal places. The 99.5% confidence interval is ( 84.247 85.753).
The average efficiency of the sample is calculated to be 88.5% and the standard deviation of the sample is 0.5 percentage point. (a) Determine a 95% confidence interval for the mean efficiency of the (b) If we want to cut the confidence interval to …
The 99.5% confidence interval is ( Section 05.01 Exercise 12 - Compute confidence interval; Find necessary sample size in a sample of 70 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2.
Question: In a sample of 60.0 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2 .Find a 98% lower confidence bound for the mean efficiency. (Round the final answer to three decimal places.)The 98% lower confidence bound isThe claim is made that the mean efficiency is greater than 84.600%.
