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A washing machine Manufacturer says that 85% of its washers last 5 years before repairs are necessary. A random sample of 100 washers showed that
A washing machine Manufacturer says that 85% of its washers last 5 years before repairs are necessary. A random sample of 100 washers showed that 79 of them lasted five years before they needed repair. Test to see if there is a difference between the manufacturer claim and the sample results. Test statistic? P-value? ,is manufacturer claim too high or to low, ues or no?
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