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    hypothesis test




    True or False: Referring to the table below, the null hypothesis will be rejected.
    TABLE
    An appliance manufacturer claims to have developed a compact microwave oven that
    consumes an average of no more than 250 Watts. From previous studies, it is believed that power consumption for microwave ovens is normally distributed with a standard deviation of 15 Watts. A consumer group has decided to try to discover if the claim appears true at .05 level of significance. They take a sample of 20 microwave ovens and find that they consume an average of 257.3 Watts.

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    Re: hypothesis test

    Hi! We are glad that you posted here! This looks like a homework question though. Our homework help policy can be found here. We mainly just want to see what you have tried so far and that you have put some effort into the problem. I would also suggest checking out this thread for some guidelines on smart posting behavior that can help you get answers that are better much more quickly.
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    Re: hypothesis test


    I have got the following


    z-value 2.1764
    one-tailed p-value 0.0148

    95% confidence internvals
    upper Inf
    lower 244.483

    Reject Null

    True

    Is the ans correct?

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