Since the P-value is 0.005 which is
less than the significance level of 0.01, the decision is to reject
the null hypothesis. There is strong evidence to say that more than
75% of adults agree that it is morally wrong to not report all
income on tax returns.
For the following exercises,
use your calculator to conduct the hypothesis test. Remember
to use the correct test on the calculator (Are you testing a mean
or a proportion? Is given or
not?)
State the null (H0) and
alternative (H1) hypotheses.
Give the test statistics and the p-value for this
significance test.
Make a decision on whether or not to
reject the null hypothesis.
Summarize the conclusion in the context
of this problem.
A random sample of 300 one-year old
baby boys is studied and their weights in pounds are recorded.
Their mean weight was 25.7 pounds with a standard deviation 5.3
pounds. A medical researcher claims that the mean weight of
one-year old boys is greater than 25 pounds. Does this study
provide convincing evidence that the researcher’s claim is true?
Use a 0.02 level of significance.
State the null (H0) and
alternative (H1) hypotheses.
Give the test statistics and the
p-value for this significance test.
Make a decision on whether or not to
reject the null hypothesis.
Summarize the conclusion in the
context of this problem.