Mathematics, 13.03.2020 11:34 ogpuhl

An automobile insurance company claims that its rates for teenage drivers average $410 less per year than the same coverage from another company.
In a random sample of 35 customers, the average savings was $390 per year, with a standard deviation of $55 per year. What is the z-value rounded to the nearest hundredth? Is there enough evidence to reject the claim?

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