3. A presidential candidate has decided to enter primaries in those states in which at least 20% of voters support her. Random samples of 200 voters were taken in each of a number of states. In New Hampshire, 30 voters supported the candidate. Test at a 5% level of significance to determine whether the candidate should enter the New Hampshire primary. What is the p-value for this test? What is your conclusion?

4. Samples of final examination scores for two statistics classes with different instructors provided the following results: For instructor "A" the sample size was 18, the sample mean score was 71 and the sample standard deviation was 6. For instructor "B" the sample size was 21, the sample mean score was 77 and the sample standard deviation was 8. At a 1% level of significance, test whether these data are sufficient to conclude that the mean scores for the two classes are the same? What is your conclusion?

5. In a random sample of 200 Republicans,160 indicated they opposed the new tax law proposal. While in a random sample of 120 Democrats, 84 opposed the tax law. At a 5% level of significance, test to determine if there is a significant difference in the proportion of Republicans and Democrats opposed to this new law. What is your conclusion?

Subject | Mathematics |

Due By (Pacific Time) | 04/25/2015 07:00 pm |

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