Question

The average weight of a package of rolled oats is supposed to be at least 18 ounces. A sample of 18 packages shows a mean of 17.78 ounces with a standard deviation of 0.41 ounce.

(a)	At the 5 percent level of significance, is the true mean smaller than the specification? Clearly state your hypotheses and decision rule.

a.

H₀: μ ≥ 18. Reject H₀ if t_calc > –1.74

b.

H₁: μ < 18. Reject H₁ if t_calc < –1.74

c.

H₀: μ ≥ 18. Reject H₀ if t_calc < –1.74

d.

H₁: μ < 18. Reject H₁ if t_calc > –1.74

	a
	b
	c
	d

(b)

If α = .01, we would have

a.

failed to reject the null hypothesis.

b.

rejected the null hypothesis.

	a
	b

(c)	Use Excel to find the p-value. (Round your answer to 4 decimal places.)

Answer 1