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questions
Question
Possible
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Earned
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Useful Signs
â‰¥
â‰¤
â‰
Î¼
Ïƒ
Some of the following statements refer to the null hypothesis, some to the alternate hypothesis. State the nu
1 hypothesis. Ha, in terms of the appropriate parameter (Î¼ or p).
a
The mean number of years Americans work before retiring is 34.
b
An urban police department claims that the proportion of crimes committed after dusk will fa
c
The mean starting salary for San Jose State University graduates is at least \$100,000 per year.
d
Fewer than 5% of adults ride the bus to work in Los Angeles.
e
Expedia would like to test if the average round-trip airfare between Philadelphia and Dublin is
f
A university interested in tracking its honors program believes that the proportion of graduate
It is generally believed that no more than 0.50 of all babies in a town in Texas are born out of wedlock
politician claims that the proportion of babies born out of wedlock is increasing.
a
b
c
d
What is the population parameter of interest in testing the politicians claim?
What is the statistic that is used in this hypothesis test?
Is this a one sided or two sided test?
What are the hypotheses?
3 Excel’s function ________ returns the p -value for a right-tailed test of the population mean, when the raw da
Page 1
questions
4 To obtain the p -value for a right-tailed test of the population mean, when Ïƒ is unknown, we use the Excel’s f
5 Using the INCOME variable from the dataset, address the following questions:
a) what is the average INCOME of respondents in this dataset?
b) The Census states that the average income of the US population is \$50,000 and a standard devation of \$10
determine if the income of respondents in this dataset is greater than the total US population. Show your hy
alpha, p-value, decision to reject or fail to reject and your interpretation.
a) Hypotheses (in mathematical notation)
b) alpha
c) test statistic
d) p value
e) decision
f) interpretation
Using the dataset in this file, test whether or not the data support the statement that the average amoutn sp
6 (MNTSWEETPRODUCTS) is less than \$28.
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questions
Page 3
questions
Rules
1) show your work using excel when possible.
3) If you use another worksheet, give it an appropriate name (#2) and reference it on this page
5) do not delete the points table
ternate hypothesis. State the null hypothesis, H 0, and the alternative
es committed after dusk will fall below the current level of 0.84 if LED streetlights are installed.
es is at least \$100,000 per year.
ween Philadelphia and Dublin is less than \$2,100.
that the proportion of graduates with a GPA of 3.00 or below is less than 0.20. In a sample of 200 graduates, 30 students have a GPA of 3
Texas are born out of wedlock. A
reasing.
iticians claim?
pulation mean, when the raw data is available and alpha is known.
Page 4
questions
s unknown, we use the Excel’s function ________.
and a standard devation of \$10,000. Conduct a hypothesis test to
al US population. Show your hypotheses, test statistic calcuations,
ent that the average amoutn spent on sweet products
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questions
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uates, 30 students have a GPA of 3.00 or below
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Age
Marital_St
Teenhom
Education atus
Kidhome e
Age Categorical
Income
Age Categorical
19 18 to 29 2n Cycle Married