Question

Ar lei a den mr A packaging device is set to fill detergent packets with a mean weight of 150 g. The standard deviation is known periodically because if it is i underfilling the firm is liable to prosecution. A random sample of 25 filled boxes is en and weighed, giving a mean net weight of 152.5 Can we conclude that the machine is no longer pr Use a 5% significance level (0.05 significance level). to be 5.0g It is important to check the machine filling it increases the cost of the materials, whereas if it the mean net weight oF 150 g Fallowing the stepi otheses ) Ser up eaistic fortula Determine the level of signuificance and the type of the test 4Write down the decision rule with rejection region Do relevant calculation 6) Drivg a conchusion 02. a company has developed an aptitude test for screening ed the ed that the mean mark potential employees The persan who dev tained with a random sample of The pitsonnel department atta t the onlicants 96 5.2, m-13 that ginst ahe llernative that the mean mark is ls d the mean mark is 100 Jun 100, at the 1% level Following the staps Set up the hypotheses Show the test statistic forula Determine the level of significance and the type of the test )Write down the decision nale with rejection region o relevant calculation 6) Dra aconcluson

Answer 1

Ques 1 is done.

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