A manufacturer claims that a machine produces metal discs wi…
Questions
A mаnufаcturer clаims that a machine prоduces metal discs with an average diameter оf 10 cm, with a pоpulation standard deviation of 1.25 cm. A quality control team takes a random sample of 40 rods, finding an average length of 9.5 cm. At a 5% significance level, test whether the machine's production differs from the claimed mean of 10 cm. The proper test for this hypothesis test is [test]. The alternative hypothesis, H1, is [alternative_hypothesis]. The value for the test statistic is [test_statistic]. The p-value for this hypothesis test is [p-value]. The correct statistical decision is to [decision]. Hint: Choose the correct answer for each question from the drop-down menus above. Make sure to answer all five questions! Save your work in MS Excel and submit your Excel file at the end of the exam.
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