The average cholesterol level for Americans is 176 mg/dL. A researcher wishes to determine whether eating...
The average cholesterol level for Americans is 176 mg/dL. A researcher wishes to determine whether eating a vegetarian diet can reduce cholesterol. She randomly selects 81 vegetarians and finds that there average cholesterol is 123.43 mg/dL with a standard deviation of 42.67 mg/dL. Is there enough evidence to suggest that a vegetarian diet can reduce cholesterol? Find the test statistic and the P-value. Test Statistic: Round your answer to two decimal places P < Use the table and round your answer to 4 decimal places.
Homework Answers
This is the left tailed test .
The null and alternative hypothesis is
H0 : 
= 176
Ha :
< 176
Test statistic = t
= (
- 
) / s / 
n
= (123.43 - 176) / 42.67 /
81
= -11.09
Test statistic = -11.09
df = 80
P-value = 0.0000
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