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Statistics Questions 1. One thousand out...

Statistics Questions

1. One thousand out of two thousand registered voters sampled indicated they planned to vote for the Republican candidate for the state's U.S. senator. Using 0.95 degree of confidence, what is the interval estimate for the population proportion (to the nearest tenth of a percent)?

a. 69.2% to 86.4%

b. 76.5% to 83.5%

c. 77.7% to 82.3%

d. 78.2% to 81.8%

2. A 95% confidence interval infers that the population mean

a. is between 0 and 100%

b. is within + and - 1.96 standard deviations of the sample mean

c. is within + and - 1.96 standard deviations of the population mean

d. is within + and - .25 standard deviations of the sample mean

3. College officials indicate that at least 70% of the voting student population supports the proposed tuition and fee increase. If the 95% confidence interval is 0.75 to 0.85, what conclusion can be drawn based on a 95% level of confidence?

a. 70% is not in the interval, need to take another sample

b. 70% is not in the interval, so assume it will not be supported

c. 70% is below the interval, so assume it will be supported

d. Since this estimate was not based on the voting student population, we cannot make a decision

4. A sample of twenty-five is selected from a known population of one hundred elements. What is the finite population correction factor?

a. 8.66

b. 75

c. 0.87

d. cannot be determined

5. Which concept is a test statistic used to test a hypothesis about a population mean?

a. the alpha level

b. the Type II error

c. the population mean

d. the z statistic

Questions 6 and 7 pertain to the following data set:

6. Based on the Nielson Ratings, the local CBS affiliate television station claims its 11:00 pm newscast reaches 41% of the viewing audience in the market area. In a survey of 100 viewers, 36% indicated that they watch the late evening news on this local CBS affiliate televisions station. What is the research hypothesis?

a. The population proportion is equal to 36%

b. The population proportion is equal to 41%

c. The population proportion is not equal to 36%

d. The population mean is equal to 41%

7. What is the null hypothesis?

a. The population proportion is equal to 36%

b. The population proportion is equal to 41%

c. The population proportion is not equal to 41%

d. The population mean is not equal to 41%

1. One thousand out of two thousand registered voters sampled indicated they planned to vote for the Republican candidate for the state's U.S. senator. Using 0.95 degree of confidence, what is the interval estimate for the population proportion (to the nearest tenth of a percent)?

a. 69.2% to 86.4%

b. 76.5% to 83.5%

c. 77.7% to 82.3%

d. 78.2% to 81.8%

2. A 95% confidence interval infers that the population mean

a. is between 0 and 100%

b. is within + and - 1.96 standard deviations of the sample mean

c. is within + and - 1.96 standard deviations of the population mean

d. is within + and - .25 standard deviations of the sample mean

3. College officials indicate that at least 70% of the voting student population supports the proposed tuition and fee increase. If the 95% confidence interval is 0.75 to 0.85, what conclusion can be drawn based on a 95% level of confidence?

a. 70% is not in the interval, need to take another sample

b. 70% is not in the interval, so assume it will not be supported

c. 70% is below the interval, so assume it will be supported

d. Since this estimate was not based on the voting student population, we cannot make a decision

4. A sample of twenty-five is selected from a known population of one hundred elements. What is the finite population correction factor?

a. 8.66

b. 75

c. 0.87

d. cannot be determined

5. Which concept is a test statistic used to test a hypothesis about a population mean?

a. the alpha level

b. the Type II error

c. the population mean

d. the z statistic

Questions 6 and 7 pertain to the following data set:

6. Based on the Nielson Ratings, the local CBS affiliate television station claims its 11:00 pm newscast reaches 41% of the viewing audience in the market area. In a survey of 100 viewers, 36% indicated that they watch the late evening news on this local CBS affiliate televisions station. What is the research hypothesis?

a. The population proportion is equal to 36%

b. The population proportion is equal to 41%

c. The population proportion is not equal to 36%

d. The population mean is equal to 41%

7. What is the null hypothesis?

a. The population proportion is equal to 36%

b. The population proportion is equal to 41%

c. The population proportion is not equal to 41%

d. The population mean is not equal to 41%

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