Please answer the following question. The picture below is the drop down menu se

Question

Please answer the following question. The picture below is the drop down menu selections.

A quality control manager at RAYOVAC wants to estimate the mean life of the company's best-selling 9-volt alkaline battery under normal use conditions. Based on extensive historical data, it is known that 10 hours. A random sample or 64 light bulbs indicated a sample mean life of 33.4152 hours. Construct a 97% condence interval estimate tor the population mean life of all RAYOVAC's best- selling 9-volt alkaline battery. Use only the appropriate formula and/or statistical table in your textbook to answer this question. Answer using conventional rounding rules) s (Click to select) hours (Negative amounts should be indicated by a minus sign. Report your lower and upper confidence limits to 4 decimal places

Explanation / Answer

mean = 33.4152

standard deviation = 10

margin of error = z-score * std/sqrt(n)

= 2.17 * 10/sqrt(64)

= 2.7125

lower bound = 33.4152 - 2.7125 = 30.7027

upper bound = 33.4152 + 2.7125 = 36.1277

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