A bag of potatoes has a stated weight of 10 pounds with σ = 0.75 pound. A sample of 30 bags has an average weight of 10.3 pounds.
Conduct a hypothesis test using a 1% significance level for:
H0: μ = 10
H1: μ ≠ 10 - ️️fail to reject the null hypothesis
Reason:
zc = 2.58 and z = ...
BUSI 2305 CHAPTER 10 SMARTBOOK -
HW 59 (STUDY GUIDE)
A bag of potatoes has a stated weight of 10 pounds with σ
= 0.75 pound. A sample of 30 bags has an average weight
of 10.3 pounds.
Conduct a hypothesis test using a 1% significance level
for:
H0: μ = 10
H1: μ ≠ 10 - ✔ ✔ fail to reject the null hypothesis
Reason:
zc = 2.58 and z = 2.19
A brand of chocolate bar has a stated weight of 6 oz. with
σ = 0.25 oz. A sample of 9 bars has an average weight of
6.05 oz.
Test H0: μ = 6 oz. H1: μ ≠6 oz. at the 5% significance
level. - ✔ ✔ Fail to reject the null hypothesis
reason: zc= 1.96 and z=0.6
A cereal manufacturer tests a sample of 50 boxes of
cereal to see if the average weight per box is 14 ounces.
Which of these would be a valid null or alternative
hypothesis for the given scenario? - ✔ ✔ H0: μ = 14
A model of car claims mileage of 24 mpg. with σ = 4 mpg.
A sample of 4 cars got an average of 20.5 mpg.
, Test H0: μ = 24 H1: μ ≠ 24 at the 10% significance level. -
✔ ✔ Reject the null hypothesis
Reason:
zc = -1.65 and z = -1.75
A paint manufacturer claims that a gallon of their paint will
cover at least 1200 square feet of smooth wall with σ = 80
square feet. Thirty-six gallons of paint were tested and the
average square feet covered was 1175.
Conduct a hypothesis test using a 5% significance level
for:
Reason:
zc = -1.65 and z = -1.88
A soda bottling company fills bottles with 12 ounces of
soda. Overfilling causes the company to give away free
soda. Underfilling causes the company to cheat the
customer. To test to see if the process is working
correctly, the company conducts a hypothesis test using
the following hypotheses:
Ho: μ=12
H1: μ≠12
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