Unit 3 Test Review Sheet Chapters 23, 5, and 6

Disclaimer:  This review sheet does not cover everything you should know.  It's just a helpful guide of some of the problems you might see.  To ensure complete preparation you should be reviewing your in class and out of class notes, as well as, your previous quizzes and tests.

Chapter 23

1.A report by MM Shaheen, a member of the Parliament of the Peoples' Republic of Bangladesh, reported the population in 2002 to be approximately 110 million with a 1.8% annual growth rate. What is the anticipated population in 2006?

2. In the U.S. Department of Energy's (DOE) Energy Information Administration's (EIA) International Energy Outlook 2002, it was estimated that the United States had a 60-year supply of recoverable natural gas. Approximately how long will the supply last if the total demand for natural gas increases at an average rate of 1.8% ? 

3. Attorney Gianetti retired with $2 million in a non interest-bearing savings account. The attorney figured that it would cost him $80,000 per year to live at his current standard of living. Assuming a constant 3.5% per year inflation rate, how long will his savings last?

4.  Name a few nonrenewable resources.

Chapter 5

5.  A Fast Food Company was interested in knowing whether their customers were satisfied with the overall service and cleanliness of the Company's franchises. In an effort to obtain this information, The Fast Food Company randomly selected 75 of the 325 customers from one of their 25 franchise stores to fill out a survey.  What is the sample in this situation?

6. On the final episode of the popular "Dancing with the Stars" show, viewers were asked to call in and vote for their favorite star. This is an example of what type of sampling?

7.  In an effort to determine why contract negations broke down resulting in a devastating long term strike, management formed a task force to randomly select and interview 50 of the 825 employees. The three-digit employee ID and Table 7.1 from your text was used to identify which of the employees were interviewed. Lines 106-109 of Table 7.1 are reproduced below. What would be the ID numbers of the first 15 employees selected?



8.  What do random samples seek to eliminate?

9.  A researcher administers a new migraine headache medication to a group of volunteers in order to observe whether the medication abated the intensity of headache. This is an example of what type of survey?

10.  Suppose 65% of all college students find studying for final exams a waste of time. The population proportion is p = 0.65. Suppose many different simple random samples of 3,000 college students were taken. What would be the mean of the sampling distribution?

11.  The CDC took a random sample of 530 people that lived near high voltage towers. Of these people, they found that 345 developed some form of cancer. Give a 95% confidence statement for the proportion p of all people who live near high voltage towers and develop cancer.

Chapter 6

Thanks to Marc K.

1. What are individuals? What are variables? How are they related?
2. What is distribution and how is it shown in a histogram?
3. What can be used to describe the overall pattern of a histogram?
4. What is an outlier and how does it differ from deviation?
5. How do you make a stemplot and how is it useful?
6. How do you find the mean of a set of data, and how does it differ from the median? Which might be a more accurate representation of the center of the data and why?
7. What are the 5 numbers of a 5 number summary?
8. How is a boxplot made? Why is it useful?
9. What do histograms show that boxplots do not?
10. What is the explanatory variable? What is the response variable?
11. What is a scatterplot? Why are these used?
12. How do you describe the overall pattern of a scatterplot?
13. What are outliers and how do they effect the line of best fit, median, mean, and quartiles?
14. What is a regression line? Why do outliers effect it?
15. What is correlation? What causes a lower correlation? A higher correlation? What is the highest possible correlation?
16. What is a least squares regression line?

Important Terms to Know Review:

Chapter 23

Nonrenewable resources
Renewable resources
Static reserve*
Exponential reserve
Population
Growth rate
Maximum sustainable yield **
Reproduction curve

Chapter 5
--Producing data--

Population
Sample
Simple random sample
Types of samples
-Bad samples
-Good samples
Margin of error
Experiments
Observational studies

Chapter 6

Histograms
5-number summary
Mean
Median
Correlation
Association
Box plot
Stem plot
Scatter plot
Standard deviation
Variance
Smoothing
Outliers and their impact on Mean, Median, and Regressions
Regression
Least Squares Line