37
Answer (Choose 1 answer)
Let
A simple random sample of 5-year-old boys from a city is obtained and their weights are listed below.
20.025 1.96; to.025.10-2.23
50 38 58 51 34 89
20.05 1.65; to.05,10-1.81
57 44 75 27 64
Use a 0.05 significance level to find the critical value to test the claim that the population mean is smaller than 50.Assume that population has normal distribution.
A. 2.23
B. -1.96
C. -1.81
