{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

19584648-Null-Hypothesis-Statistics-ZTest-Significance

# 19584648-Null-Hypothesis-Statistics-ZTest-Significance -...

This preview shows pages 1–3. Sign up to view the full content.

Statitics, Null Hypothesis, z-test, significance 009647504541577 Hypothesis Testing For a Population Mean The Idea of Hypothesis Testing Suppose we want to show that only children have an average higher cholesterol level than the national average. It is known that the mean cholesterol level for all Americans is 190 . Construct the relevant hypothesis test: H 0 : m = 190 H 1 : m > 190 We test 100 only children and find that x = 198 and suppose we know the population standard deviation s = 15. Do we have evidence to suggest that only children have an average higher cholesterol level than the national average? We have z is called the test statistic . Since z is so high, the probability that Ho is true is so small that we decide to reject H 0 and accept H 1 . Therefore, we can conclude that only children have a higher cholesterol level on the average then the national average.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Statitics, Null Hypothesis, z-test, significance 009647504541577
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 4

19584648-Null-Hypothesis-Statistics-ZTest-Significance -...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online