Pilar bought 2/3 pound of turkey. She ate 1/4 of the turkey for lunch. How many pounds of turkey did she eat?
1 answer:
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Answer:
The null hypothesis is:
The alternative hypothesis is:
Step-by-step explanation:
At the null hypothesis, we test if the mean is equal to a certain value.
At the alternate hypothesis, we test if the mean is less than, more than, or different from the value tested at the null hypothesis.
The tuft bind strength of a synthetic material used to make carpets is known to have a mean of 100 lb and standard deviation of 20 lb.
This means that the null hypothesis is:
Could it be that the average tuft strength is above 100 lb?
The world above means that the appropriate alternative hypothesis is:
The first equation tells you that . If you substitute this expression for
in the second, we have
And we can deduce