Is claim justified if a 90-percent confidence level is use

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The resistance of coil manufactured by a certain company is claimed to have a mean value of resistance of 100 ohms. A sample size of 50 coils is taken and it is found that the sample mean is 115 ohms and the sample standard deviation is 10 ohms. a) Is the claim justified if a 95% confidence level is used? b) Is the claim justified if a 90% confidence level is used?

Reference no: EM13269844

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