1 answer

A company that produces cell phones claims its standard phone battery lasts longer on average than...

Question:

A company that produces cell phones claims its standard phone battery lasts longer on average than other batteries in the market. To support this​ claim, the company publishes an ad reporting the results of a recent experiment showing that under normal​ usage, their batteries last at least 34 hours. To investigate this​ claim, a consumer advocacy group asked the company for the raw​ data, which are shown to the right. Find a 90​% confidence interval and state your conclusion. Explain how you dealt with any outliers.

Time 30, 31, 32, 34, 32, 32 / 31, 32, 34, 56, 31, 33

1. Find the confidence interval usisng all the data (Round to two decimal places)

2. if outliers are present, find the confidence interval without the outlier ( Round to two decimal places)


Answers

1) 90% confidence interval for population mean life of cellphone battery n 12 X 34 hours s 7.0324 hours Sample Size Sample Me

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