Question
The National Institute of Mental Health published an article stating that in any oneyear period, approximately 9.5 percent of American adults suffer from depression or
The National Institute of Mental Health published an article stating that in any oneyear
period, approximately 9.5 percent of American adults suffer from depression or a
depressive illness. Suppose that in a survey of 100 people in a certain town, seven of them
suffered from depression or a depressive illness. Conduct a hypothesis test to determine if
the true proportion of people in that town suffering from depression or a depressive illness
is lower than the percent in the general adult American population.
a. Is this a test of one mean or proportion?
__________________________
b. State the null and alternative hypotheses.
Ho: ____________________ Ha: ____________________
c. Is this a righttailed, lefttailed, or twotailed test?
___________________________
d. What symbol represents the random variable for this test?
___________________________
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