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(Choose 1 answer)
(See picture)
A. Two tails test; the mean burning rate is still about 50 cm/s
B. Left tails test; the mean burning rate significantly less than 50 cm/s
C. None of the others
D. Two tails test; the mean burning rate significantly differs from 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 2 centimeters per second. The experimenter decides to specify a type I error probability or significance level of a = 5% and selects a random sample of n = 25 and obtains a sample average burning rate of 51.3 centimeters per second. What conclusions should be drawn?Given that Z0.025 1.96
