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A humane society claims that less than 31%of U.S. households own a dog. In a random sample of 405U.S. households,156say they own a dog. At alphaequals0.01,is there enough evidence to support the society's claim?
(a) Write the claim mathematically and identify Upper H 0and Upper H Subscript a.
(b) Find the critical value(s) and identify the rejection region(s).
(c) Find the standardized test statistic.
(d) Decide whether to reject or fail to reject the null hypothesis, and
(e) interpret the decision in the context of the original claim.
what is the post-test probability of disease being present in a patient with a positive test result for test A if a cutoff value of 4.0 mg/ml is chosen?
an experiment involves selecting a random sample of 256 middle managers at a random for study. one item of interest is
Craft one page brief of the statistical results (include any additional pages needed for any APA tables or graphs and the SPSS syntax and output) in which you do the following:
the only fruit shop received a shipment of fruit and they would like to estimate the percentage of fruit which meets
Show that if the roots of the polynomial p are all real, then the roots of p' are all real. If, in addition, the roots of p are all simple, then the roots of p' are all simple.
a cognitive psychologist would like to evaluate the claim that the omega-3 fatty acids in fish can help improve memory
the critical boundaries for a hypothesis test are z= +1.96 and -1.96. if the z score for the sample data is z= -1.90, what is the correct statistical decision?
How many years of warranty would good quality car owners have to offer to credibly differentiate (separate) themselves from bad quality. i.e. credibly signal their quality?
Example: The correlation coefficient between natural disaster and the number of doctors in the area was .95. The Martian concluded that doctors cause spontaneous generation natural disasters.
general instructionsuse the spss data file produced from the national child development study ncds to answer the
two companies market new batteries targeted at owners of personal music players. duratunes claims a mean battery life
Using part(a), explain to investor differences between distribution of performance figures for the 2 kinds of stock funds.
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