Fill in the Blanks 2. A political pollster surveys a random sample of registered

Question

Fill in the Blanks

2. A political pollster surveys a random sample of registered Republicans and compares the results with those obtained from a random sample of registered Democrats. These samples could be described as (independent/dependent) ____________ samples.

5. When testing a hypothesis about two population means, the z-test may be used if both sample sizes are ______________________________ .

6. When comparing the means of two independent samples, the population standard deviations will almost always be _____________ (known/unknown)

7. A test we can use to determine whether the two population variances are equal is: ___________

9. If a random variable has an F distribution with 12degrees of freedom in the numerator and 7 degrees of freedom in the denominator, what value of the random variable is exceeded with probability equal to .05? __________________

10. When testing whether one population proportion was significantly greater than another, the p-value equaled .03. If the test was being carried out at a level of significance = .05, the null hypothesis would be ___________________.

12. Comparing proportions from two independent samples involves a ________ test.

13. Samples where two measurements are taken on a before and after basis for the same individuals are called ____________ samples.

14. When testing dependent samples, we test for only one variable, the _______________________.

Explanation / Answer

Dear student,

According to Chegg guidelines,only the first four questions are answered.

2, Independent. Since there is no dependence among the two samples.

5, greater than 30

As we know, z test is used for large sample tests.

6, unknown.

7, chi squared test with n-1 degrees of freedom.

Please give a THUMBS UP!!

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