27
(Choose 1 answer)
(See picture)
A. Fail to reject HO, the mean burning rate is significantly larger than 50 cm/s
B. Reject HO, the mean burning rate is significantly less than 50 cm/s
C. Reject HO, the mean burning rate is significantly differs from 50 cm/s
D. Fail to reject HO, the mean burning rate is still about 50 cm/s
Specifications require that the mean burning rate must be 50 centimeters per second. We know that the standard deviation of the burning rate is a = 2 centimeters per second. The experimenter selects a random sample of n = 25 and obtains a sample average burning rate of 51.3 centimeters per second.By considering the 2 hypotheses H : μ = 50; H₁: μ≠ 50 with a significance level of 5%, what conclusions should be drawn?Given that Z0.025 1.96
