Question
Suppose a manufacturer claims that each family-size bag of pretzels sold weighs 12 ounces on average with a standard deviation of 0.8 ounces. A consumer's group decides to test this claim. If a simple random sample of 49 bags of pretzels gives a sample mean of 11.8 ounces, is this significant evidence that the actual weight of a bag of pretzels is different from the manufacturer's claim?
(a) State the hypothesis.
(b) Describe and draw the corresponding sampling distribution.
(a) State the hypothesis.
(b) Describe and draw the corresponding sampling distribution.
Answers
MathGuru
I'll get you started.
Hypotheses:
Ho: µ = 12 --> this is the null hypothesis
Ha: µ ≠ 12 ---> this is the alternate or alternative hypothesis
Note:
Null hypothesis always uses an equals sign. The alternate or alternative hypothesis in this case uses a "does not equal" sign because the problem is just asking if there is a difference. There is no specific direction mentioned (such as "greater than" or "less than" or similar statements).
I'll let you take it from here.
Hypotheses:
Ho: µ = 12 --> this is the null hypothesis
Ha: µ ≠ 12 ---> this is the alternate or alternative hypothesis
Note:
Null hypothesis always uses an equals sign. The alternate or alternative hypothesis in this case uses a "does not equal" sign because the problem is just asking if there is a difference. There is no specific direction mentioned (such as "greater than" or "less than" or similar statements).
I'll let you take it from here.