Multiple Choices
Answer (Choose 1 answer)
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 57 44
20.05 1.65; to.05,10-1.81
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.
Α. -1.96
B. 1.65
C. -1.81
D. 2.23
E. None of the other choice is correct
Let
