Question

The average battery life of the iPhone !4 Max Pro is reported to be 11 hours by appleinsider.com. Assume that the standard deviation for the battery life for this cell phone is 30 minutes. A random sample of 50 iPhone 14 Max Pros had an average battery life of 10.7 hours. Use a 90% confidence interval to test the validity of appleinsider.com’s claim.

Answer 1

To test the validity of appleinsider.com's claim about the average battery life of the iPhone 14 Max Pro, a hypothesis test and confidence interval can be used. The test results suggest that there is not enough evidence to support appleinsider.com's claim of 11 hours.

Step-by-step explanation:

To test the validity of appleinsider.com's claim, we can use a hypothesis test and construct a confidence interval.