Determine the null hypothesis and the alternate hypothesis: ********************
ID: 2947330 • Letter: D
Question
Determine the null hypothesis and the alternate hypothesis:
**************************
A Harris Poll conducted October 28, 2008 surveyed 2119 US adults who were asked “when you think of rising health care costs, who do you think is most responsible?” One theory is that 50% of adults blame insurance companies, 10% blame pharmaceutical companies, 10% blame Federal and state governments, 10% blame hospitals, 10% blame physicians, 5% blame some other entity, and 5% are unsure who is most responsible. Actual survey responses follow:
Most Responsible for Rising Health Care Costs
Number Responding
Insurance companies
869
Pharmaceutical companies
339
Government
338
Hospitals
127
Physicians
85
Other entity
128
Not sure
233
Total
2119
At a 0.02 level of significance, do the actual results match the theoretical percentages?
Choose the correct HOand HA statements:
A)
HO : Distribution of observed frequency percentages for healthcare blame DOES NOT FIT distribution of expected frequency percentages for healthcare blame (?)
HA: Distribution of observed frequency percentages for healthcare blame FITS distribution of expected frequency percentages for healthcare blame
B)
HO : ?expected = ?observed
HA: ?expected ? ?observed
C)
HO : Distribution of observed frequency percentages for healthcare blame FITS distribution of expected frequency percentages for healthcare blame
HA: Distribution of observed frequency percentages for healthcare blame DOES NOT FIT distribution of expected frequency percentages for healthcare blame (?)
D)
HO : pexpected = pobserved
HA: pexpected ? pobserved
The most appropriate hypothesis test to use for this scenario is:
A)
t - test for independent means
B)
one-way ANOVA
C)
?2test for goodness-of-fit
D)
?2test for independence
E)
two population proportion z - test
Most Responsible for Rising Health Care Costs
Number Responding
Insurance companies
869
Pharmaceutical companies
339
Government
338
Hospitals
127
Physicians
85
Other entity
128
Not sure
233
Total
2119
Explanation / Answer
Hypotheses:
HO : Distribution of observed frequency percentages for healthcare blame FITS distribution of expected frequency percentages for healthcare blame
HA: Distribution of observed frequency percentages for healthcare blame DOES NOT FIT distribution of expected frequency percentages for healthcare blame
Option C is correct.
Appropriate hypotheses: ?2test for goodness-of-fit
Option C is correct.
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