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Mathematics, 08.11.2019 21:31 travisvb
An appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 250 w. from previous studies, it is believed that power consumption for microwave ovens is normally distributed with a population standard deviation of 15 w. a consumer group has decided to try to discover if the claim appears true. they take a sample of 20 microwave ovens and find that they consume a mean of 257.3 w. what is the critical value with a level of significance of 0.05 and what is the test statistic and what is the p value?
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