Chapter 1 QUIZ

TRUE OR FALSE

Question 1.175

1. True or false: Statistical inference consists of methods for estimating and drawing conclusions about sample characteristics based on the information contained in the population.

Question 1.176

2. True or false: A parameter is a characteristic of a sample.

FILL IN THE BLANK

Question 1.177

3. Statistics is the art and science of ___________, analyzing, presenting, and interpreting data.

Question 1.178

4. An __________ is the set of values of all variables for a given element.

Question 1.179

5. A statistic is a characteristic of a __________.

SHORT ANSWER

Question 1.180

6. Is a sample survey examining the effects of secondhand smoke an example of an experimental study or an observational study?

Question 1.181

7. State which type of statistical study is involved in the following. A large pharmaceutical company is interested in whether a new drug will reduce Alzheimer's disease symptoms in elderly patients.

Question 1.182

8. For the study in the previous exercise, identify the predictor variable and the response variable.

CALCULATIONS AND INTERPRETATIONS

Question 1.183

9. Suppose we are interested in the proportion of lefthanded statistics students, and we take a sample to estimate the percent of students in our class who are left-handed.

  1. What is the population?
  2. What is the sample?
  3. What is the variable? Is it quantitative or qualitative?
  4. Is the sample proportion likely to be exactly the same as the population proportion? Is it likely to be very far away from the population proportion? Explain.

Question 1.184

10. Describe what is wrong, if anything, with the following survey question. “How often would you say that you attend the movie theater: often, occasionally, sometimes, seldom, or never?”