Question

SCENARIO 9-3 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. True or False: Referring to Scenario 9-3, the null hypothesis will be rejected at 1% level of significance. Select one: A. True B. False

Answer 1

solution;

given that

the devolep consumption of a compact microwave oven more then 250w

a population of a standard deviation is 15w

then find the consume mean 257.3w

explanation;

the statement is false

solid av The Noll and alternative hypotheses Ho i u 250 9.50 Ha ; u null hypothesis the test Under the statistic is X -u Z کاه =257.3-250 16.520 2%.18 find the g-value can Now we the standard using refering table Hence the pi value js.

Q-value = P(Z >2.18) 20-0146. Since the @- value is grater than ool the null therefore fail to reject: we, hypothesis Hence the stastement is falser