O CONFIDENCE INTERVALS AND HYPOTHESIS TESTING Shasia v Confidence interval for the population mean: Use of the standar... The iretime of a certain brand of battery is known to have a standard...

Extracted text: O CONFIDENCE INTERVALS AND HYPOTHESIS TESTING Shasia v Confidence interval for the population mean: Use of the standar... The iretime of a certain brand of battery is known to have a standard deviation of 23 hours. Suppose that a random sample of 150 such batteries has a mean lifetime of 33.2 hours. Based on this sample, find a 90% Confidence interval for the true mean lifetime of all batteries of this brand. Then give its lower limit and upper limit. 圖 Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit: LI Upper limit: I Explanation Check 20ZIMCUraw HlLEGUICatIon. AlL Rights Reserved. Terme of Uee I Privacy Accessibilitu