# Sampling And Error Algebra Quiz Algebra Homework Help

### Question Description

1. Which of the following situations would not produce an unbiased random sample?

a. Send a survey to students at an online private high school to find out how many students use the computer to do school work.

b. Asking every twentieth person on a list of registered voters to determine which political candidate is favored.

c. Ask every tenth person in 12th grade at Jacaranda high school to find out the favorite TV show for seniors at that school.

d. Survey 2 teachers in each subject at Bluefort High School to find out how many had graduate degrees.

2. Which of the following situations could be used to produce an unbiased random sample?

a. Surveying students in a college psychology class to find out preferred majors of students at that school.

b. Asking people at the local supermarketwhat their favorite brand of ice cream is to find out what the preferredbrand of ice cream is in that city.

c. Survey every tenth audience member leaving the American Country Music Awards and ask what their favorite type of music is.

d. Finding the heights of all 9th gradefemale students at a high school and using it to determine the averageheight of all girls at the school.

3. Find the margin of error if p = 71% and n = 100. Round to four decimal places.

a. 0.2204

b. 0.0041

c. 0.0848

d. 0.0908

4. Find the margin of error if p = 65% and n = 500. Round to four decimal places.

a. 0.0427

b. 0.0926

c. 0.0009

d. 0.0414

5. Apoll asked people to name the most serious problem facing the country.forty-three percent of the 900 randomly selected people said crime. Whatis the margin of error? Round to four decimal places.

a. 0.0165

b. 0.0330

c. 0.0261

d. 0.0523

6. Accordingto a recent poll, 40% of shoppers planned to spend \$1000 or more duringa holiday season. The margin of error was 4%. How many people weresurveyed?

a. 600

b. 38

c. 1400

d. 1000

7. One hundred people wereasked whether they would vote for Candidate A or Candidate B in anupcoming election. More people said they would vote for Candidate A. Howmany said they would vote for Candidate A if the margin of error was8.4%.

a. 92%

b. 8%

c. 77%

d. 23%

8. Five-hundredten of 650 high school students said that pizza was their favorite foodin the school cafeteria. What is the margin of error? Round to fourdecimal places.

a. 0.0005

b. 0.0003

c. 0.0161

d. 0.0322

9. Complete the sentence with the best answer.

When p stays the same but the sample size increases, the Margin of Error ___?___.

a. increases

b. decreases

c. stays the same

d. all of the above.

10. Ina recent survey 45% of students at a local high school said they lovechocolate ice cream. If the margin of error was 4.3%, about how manystudents were surveyed?

a. 973 students

b. 535 students

c. 133 students

d. 243 students