Perform the chi square test

Assignment Help Basic Statistics

Reference no: EM133181722

Quiz:
This self-assessment exercise gives you an opportunity to practice the manual performance of a chi sqOuare test for a 2X2 table.

Read the following mini-scenario and then perform the chi square test manually.

Question 1: In a cross-sectional study, 120 adults are asked if they have ever had their tonsils removed as a child (yes/no; 1/0) and, also, if they currently suffer from hay fever (yes/no; 1/0). You find that 50 of the 120 experienced a tonsillectomy as a child (the other 70 did not). Eleven of the people with prior tonsillectomy had current hay fever. Nine of those without prior tonsillectomy had current hay fever. Use a chi square test to test the null hypothesis H0: Childhood tonsillectomy and adult hay fever are independent.

Question 2: Post your final total chi square value for the 2x2 table as your answer. DO THIS CORRECT TO ONE DECIMAL PLACE. IF YOU DO IT TO TWO PLACES OR MORE YOUR ANSWER WILL BE MARKED INCORRECT; SO, TAKE CARE TO ANSWER CORRECT TO ONE DECIMAL PLACE
(e.g. 6.1 or 13.7 or 0.5 or 1.1 etc...). Answer.........

Question 3: In the above (question 1) chi square test, which ONE of the following statements is NOT correct?

The critical value for the total chi square is 3.84
The chi square test conclusion was "fail to reject"
The Degrees of freedom = 1
One expected cell value was <5

Question 4: Read the following mini-scenario and then perform the chi square test manually.
A case-control study was carried out to assess whether adults diagnosed with lymphoma (a cancer of the lymphocytes) have raised odds of tonsillectomy as a child. There are 40 cases of lymphoma and 50 people without lymphoma. Of those with lymphoma, 20 had undergone tonsillectomy as a child. Of the 50 controls without lymphoma, 10 had undergone tonsillectomy as children.
Post your final total chi square value for the 2x2 table as your answer.

You may (or may not) need to use the Fisher's exact test for one or both of the questions. Be very certain of your answers before selecting the "submit" option.

Reference no: EM133181722

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