he weight (in pounds) for a population of school-aged children is normally distributed with a mean equal to13624pounds().Suppose we select a sample of 100 children(n= 100)to test whether children in this population are gaining weight at a 0.05 level of significance.

• Part (b)
• What is the critical value for this test?
• Part (c)
• What is the mean of the sampling distribution?
• lb
• Part (d)
• What is the standard error of the mean for the sampling distribution?
• lb