A researcher performed a study to determine whether an association exists between gender and blood type. He obtained the following sample data. At the 5% significance level, researcher wants to test the following hypothesis. H0: No association between sex and blood type H0: Association exists between sex and blood type Question 1) Total number of female = Total number of male = Total number of "O" blood type people = Total number of "A" blood type people = Total number of "B" type people = Total number of "AB" blood type people = Total number of people selected = Question 2) Expected frequency of "O" blood type female = Expected frequency of "A" blood type female Expecred frequency of "B" type female Expected frequency of "AB" blood type female Expected frequency of "O" blood type male Expected frequency of "A" blood type male Expected frequency of "B" blood type male Expected frequency of "AB" blood type male Question 3) what is the Chi_Square attest Statistic When calculating Chi-Square Test Statistic, use the rounded expected frequencies from the previous question
A researcher performed a study to determine whether an association exists between gender and blood type. He obtained the following sample data.
At the 5% significance level, researcher wants to test the following hypothesis.
H0: No association between sex and blood type
H0: Association exists between sex and blood type
Question 1) Total number of female =
Total number of male =
Total number of "O" blood type people =
Total number of "A" blood type people =
Total number of "B" type people =
Total number of "AB" blood type people =
Total number of people selected =
Question 2) Expected frequency of "O" blood type female =
Expected frequency of "A" blood type female
Expecred frequency of "B" type female
Expected frequency of "AB" blood type female
Expected frequency of "O" blood type male
Expected frequency of "A" blood type male
Expected frequency of "B" blood type male
Expected frequency of "AB" blood type male
Question 3) what is the Chi_Square attest Statistic
When calculating Chi-Square Test Statistic, use the rounded expected frequencies from the previous question
Question 4) At 5% significance level, in order to calculate the critical value for the above test, the degrees of freedom is:
And the critical value is:
Question 5) At 5% significance level do the data provide sufficient evidence to reject H0
| Blood | Type | ||||
| O | A | B | AB | ||
| Gender | Female | 160 | 148 | 38 | 25 |
| Male | 149 | 118 | 42 | 20 |
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