The tensile strength of manila ropes follows a normal distribution. A random sample of 16 manila ropes has a sample mean strength 4450 kg and sample standard deviation 115 kg.Suppose that we want to test whether the mean strength of manila rope is less than 4500 kg. At a significance level ? = 0.05, the value of the test statistic and the conclusion for this test are: -1.739; Do not reject H0 -1.739; Reject H0 -1.753; Do not reject H0 -1.753; Reject H0 1.739; Reject H0
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The tensile strength of manila ropes follows a normal distribution. A random sample of 16 manila ropes has a sample mean strength 4450 kg and sample standard deviation 115 kg. Suppose that we want to test whether the mean strength of manila rope is less than 4500 kg. At a significance level a = 0.05, the value of the test statistic and the conclusion for this test are: 1.739; Reject H0 -1.753; Reject H0 -1.739; Do not reject H0 -1.739; Reject H0 -1.753; Do not reject H0
David N.
Vivek K.
A special cable has an average breaking strength of 800 pounds. The standard deviation of the population is 12 pounds. A researcher selects a sample of 20 cables and finds that the average breaking strength is 794 pounds. Can he reject the claim that the breaking strength is 800 pounds? Use the P-value method with a = 0.01 level of significance. Assume that the variable is normally distributed. Part 1 out of 5 State the hypotheses and identify the claim with the correct hypothesis H0: ÎĽ (select) H1: ÎĽ (select) This hypothesis test is a (select) test.
Ajiboye T.
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