Cigarette Smoking A researcher found that a cigarette smoker smokes on average 30 cigarettes a day. She feels that this average is too low. She selected a random sample of 9 smokers and found that the mean number of cigarettes they smoked per day was 32 . The sample standard deviation was 2.4. At α=0.10, is there enough evidence to support her claim? Assume that the population is approximately normally distributed. Use the critical value method and tables.
Cigarette Smoking A researcher found that a cigarette smoker smokes on average 30 cigarettes a day. She feels that this average is too low. She selected a random sample of 9 smokers and found that the mean number of cigarettes they smoked per day was 32 . The sample standard deviation was 2.4. At α=0.10, is there enough evidence to support her claim? Assume that the population is approximately
(a)State the hypotheses and identify the claim.
H0: claim/ do not claim
H1: claim/do not claim
This hypothesis test one tailed/two tailed a (Choose one) test.
(b)Find the critical value. Round the answer to at least two decimal places.
Critical value is
c)Compute the test value. Round the sample standard deviation and
score value to at least two decimal places as needed.
F=
P=
(d)Make the decision.
Reject/ do not reject (Choose one) the null hypothesis
(e)Summarize the results.
|
There ▼(Choose one) enough evidence to support the claim . |
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