Question

- You were told that the average number of calories in a low-calorie meal is 450. Your friend started making low calorie meals at her restaurant. You took a sample of 27 such meals and the mean for these meals is 440 and the standard deviation is 22 calories. You want to test the hypothesis that the average for this sample is different from the national average. Use α=.05.

a. what is the alternative hypothesis?

b. what is the value of the test statistic?

c. should the t-test be used?

d. what is the rejection region?

e. Should the hypothesis be rejected?

f. your friend told you that she is sure that her meals have fewer calories. Do the test again to test if she is correct. Use α=.05.

Answer #1

You were told that the average number of calories in a
low-calorie meal is 450. Your friend started
making low calorie meals at her restaurant. You took a
sample of 27 such meals and the mean for these meals is 440 and the
standard deviation is 22 calories. You want to
test the hypothesis that the average for this sample is different
from the national average, your friend told you that she is sure
that her meals have fewer calories. Do the test
again. Use...

Suppose the average number of calories in low-calorie dinner is
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healthy dinners at her restaurant. You believe that, in fact, the
average calories for average dinner is different from
600. To test the hypothesis, you took a sample of 16
dinners at your friend’s restaurant. The average for
this group is 650 calories.
a. what is the value of the test statistic?
b. should the t-test be used?
c. what is...

In one of your classes, the professor told you that average GDP
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information your professor has
is incorrect and outdated, so you decide to collect your own
data. The results of a
sample reveal that the average GDP per capita (in $1000s) among
123 industrialized
countries is calculated to be 13.6 with a standard error of
.45.
(a) If you hypothesize that your professor is incorrect and that
average...

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Scenario I: Your friend is an Applied
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obtain the following, M = 13.24, SD = 6.35. Test
whether Applied Mathematics majors have lower social skills than
other adults.
What are the hypotheses for the study?
Ho :
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Lenders tighten or loosen their standards for issuing credit as
economic conditions change. One of the criteria lenders use to
evaluate the creditworthiness of a potential borrower is her credit
risk score, usually a FICO score. FICO scores range from 300 to
850. A consumer with a high FICO score is perceived to be a low
credit risk to the lender and is more likely to be extended credit
than a consumer with a low score.
A credit card represents...

Lenders tighten or loosen their standards for issuing credit as
economic conditions change. One of the criteria lenders use to
evaluate the creditworthiness of a potential borrower is her credit
risk score, usually a FICO score. FICO scores range from 300 to
850. A consumer with a high FICO score is perceived to be a low
credit risk to the lender and is more likely to be extended credit
than a consumer with a low score.
A credit card represents...

Do all the following problems.
I. Choose the best answer for each
multiple choice. Please use CAPITAL letters to indicate your answer
and write neatly. (30 points)
1. ____ 4.____ 7. ____ 10.____ 13.
____
2. ____ 5.____ 8. ____ 11.____ 14.
____
3. ____ 6.____ 9. ____ 12.____ 15.
____
Whenever the population standard deviation is unknown and the
population has a normal or near-normal distribution, which
distribution is used in developing an interval estimation?
A. standard distribution
B....

READ THE CASE STUDY AND ANSWER THE FOLLOWING QUESTIONS
2nd CASE: An
Unexplained Death
A 65-year-old man of Scandinavian descent was rushed to the
Emergency Room of your local hospital after a family member
discovered him unconscious in his home. The woman who dialed “911”
told the dispatcher that the man, her brother, was the local
librarian of the past 10 years and had no spouse or children. She
reported that they had spoken the day before, and he had...

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