Type O-negative blood type is called the universal donor type because it is compatible with any blood type. The American Red Cross reported that the proportion of O-negative blood type in the U.S. is about 7%. A physician assistant wishes to estimate the proportion, p, of individuals with an O- negative blood type. He conducts a survey and in a random sample of 300 records from a large hospital, 27 were found to have type O-negative blood type. The sample proportion is _____________. Give a 95% confidence interval for the proportion of O-negative blood type in this hospital. Interpret your interval with the context. Test if there is strong evidence that the proportion of O- negative blood type from a large hospital is different the national proportion. State your conclusion at 5% significance level. Which method will you use to perform the test? Choose the correct one. 1-sample T test 1-sample Z test 1-proportion Z test. 2-proportion Z test Which distribution will you use here? If you use t distribution, give the degree of freedom. If you use z or normal, give the mean and standard deviation. State the null and alternative hypotheses: Give the test statistic: Find the p-value: Decision: Conclusion:
Type O-negative blood type is called the universal donor type because it is compatible with any blood type. The American Red Cross reported that the proportion of O-negative blood type in the U.S. is about 7%. A physician assistant wishes to estimate the proportion, p, of individuals with an O- negative blood type. He conducts a survey and in a random sample of 300 records from a large hospital, 27 were found to have type O-negative blood type.
The sample proportion is _____________.
Give a 95% confidence interval for the proportion of O-negative blood type in this hospital. Interpret your interval with the context.
Test if there is strong evidence that the proportion of O- negative blood type from a large hospital is different the national proportion. State your conclusion at 5% significance level.
Which method will you use to perform the test? Choose the correct one.
- 1-sample T test
- 1-sample Z test
- 1-proportion Z test.
- 2-proportion Z test
Which distribution will you use here? If you use t distribution, give the degree of freedom. If you use z or normal, give the mean and standard deviation.
State the null and alternative hypotheses:
Give the test statistic:
Find the p-value:
Decision:
Conclusion:
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