The weight (in pounds) for a population of school-aged children is normally distributed with a mean equal to12522pounds().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 (a)
• What are the null and alternative hypotheses?

A)H₀:= 125

H₁:< 125

B)H₀:= 125

H₁:125

C)H₀:125

H₁:= 125

D)H₀:125

H₁:> 125

• 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