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Answer to Question #78910 in Statistics and Probability for ANGELA OUMA
Question #78910
The breaking strengths of cables produced by manufacturer have a mean of 1800 Kg and a standard deviation of 100 Kg. by a new technique in the manufacturing process, it is claimed that breaking strength can be increased. To test this claim, a sample of 50 cables is tested and it is found that the mean breaking strength is 1850Kg. can we support the claim at the 0.01 significance level?
6. Given that H0: μ ≤ 15
H1: μ > 15
A sample of 40 provides a sample mean of 16.5 and a sample standard deviation of 7
i. At α= 0.02, what is the critical value for z and what is the rejection rule?
ii. Compute the value of the test statistics z
6. Given that H0: μ ≤ 15
H1: μ > 15
A sample of 40 provides a sample mean of 16.5 and a sample standard deviation of 7
i. At α= 0.02, what is the critical value for z and what is the rejection rule?
ii. Compute the value of the test statistics z
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