A computer Company claims that its Laptop has a battery that will last, on average, more than 3.5 hours on a full charge.

A computer Company claims that its Laptop has a battery that will last, on average, more than 3.5 hours on a full charge. A random sample of 45 of its batteries are selected for a test, and the sample mean is 3.72 hours. Assume that the population standard deviation is 0.7 hours. Test the company’s claim at a 5% level of significance. What is your conclusion?

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