In a random sample of four mobile devices, the mean repair cost was $80.00 and the...

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In a random sample of four mobile devices, the mean repair cost was $80.00 and the standard deviation was $13.50. Assume the population is normally distributed and use a t-distribution to find the margin of error and construct a 95% confidence interval for the population mean. Interpret the results. The 95% confidence interval for the population mean p is ( ) (Round to two decimal places as needed.) The margin of error is $ (Round to two decimal places as needed.) Interpret the results. Choose the correct answer below. O A. If a large sample of mobile devices are taken approximately 95% of them will have repair costs between the bounds of the confidence interval. O B. With 95% confidence, it can be said that the repair cost is between the bounds of the confidence interval. O C. It can be said that 95% of mobile devices have a repair cost between the bounds of the confidence interval. O D. With 95% confidence, it can be said that the population mean repair cost is between the bounds of the confidence interval. In a random sample of four mobile devices, the mean repair cost was $80.00 and the standard deviation was $13.50. Assume the population is normally distributed and use a t-distribution to find the margin of error and construct a 95% confidence interval for the population mean. Interpret the results. The 95% confidence interval for the population mean p is ( ) (Round to two decimal places as needed.) The margin of error is $ (Round to two decimal places as needed.) Interpret the results. Choose the correct answer below. O A. If a large sample of mobile devices are taken approximately 95% of them will have repair costs between the bounds of the confidence interval. O B. With 95% confidence, it can be said that the repair cost is between the bounds of the confidence interval. O C. It can be said that 95% of mobile devices have a repair cost between the bounds of the confidence interval. O D. With 95% confidence, it can be said that the population mean repair cost is between the bounds of the confidence interval.

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Given that x bar 80 s 1350 n Degrees of freedom413 a At 95 confidenc... View the full answer