chaps4-6reviewKey

# chaps4-6reviewKey - mw Math 112 Genl Stats Test 2 Review...

This preview shows pages 1–4. Sign up to view the full content.

mw: Math 112 Genl Stats Test 2 Review: Chapters 4, 5, & 6 Note on TI-83 keystrokes: “->” sometimes means STO (i.e. Store), and sometimes denotes following a path of menu items. The usage should be clear to users familiar with the TI-83 by the context of the command sequence. I. Chapter 4 : Gathering Data 1. All the subjects of interest are called the _______________. Population 2. The subset of the population that the data is collected on is called the ____________. Sample 3. The ______________________________ measures the outcome of interest. Response variable. 4. The variable that explains the response variable is called the ______________________________. Explanatory variable. 5. data is collected on the sample 6. There are two types of studies: _____________________________ and _________________. Observational studies, experiments 7. When a researcher observes values of the response variable and explanatory variables for the sampled subjects, without anything being done to the subjects, this is called an ______________________________. Observational study 8. When the goal of a study is to establish cause and effect, an _______________ is needed. Experiment. 9. There are many situations in which an experiment is not practical. Two of these situations are when there are ____________________________ or ____________________________. Time constraints, ethical issues. 10. When setting up a sample survey, a list of subjects in the population from which the sample will be taken is called the ________________________. Sampling frame. 11. The margin of error for estimating a population proportion with a sample survey is approximately ____________. n 1 1

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
mw: Math 112 Genl Stats Test 2 Review: Chapters 4, 5, & 6 12. When each subject in a sampling frame is given an equal chance of being selected to be in the sample, this is called a ________________________. Random sampling. 13. A ____________________________________ is when every sample of size ‘n’ subjects from a population has the same chance of being selected. Simple random sample. 14. The standard deviation of a sampling distribution is called the ________________________. Standard error. 15. Given a population with mean μ, and standard deviation . When a random sample of size σ n is taken, the sampling distribution of the sample mean x has a: a. Mean of ________. μ b. A standard error of ________, n σ 16. Give the key strokes to store 314 as a seed for the random number generator in the TI- 83:____________. 314->rand, where rand is obtained by Math->Prb->rand 17. If we have a sampling frame of size N = 100, and wish to take a random sample of the population by generating an integer between 1 and 100, give the key strokes to do this: _________________________. Math->Prb->randInt (1, 100) 18. If we are working with SAT scores that are distributed normally with a mean μ of 500, and a standard deviation of 100, that is N (500, 100), and wish to simulate sampling 50 subjects, give the TI-83 key σ strokes to generate these 50 normally distributed random numbers: _____________________________. Math->Prb->randNorm (500,100,50) 19. A sample that is easy to obtain, and unlikely to be representative of the population, is called a ________________________. Convenience sample 20. A convenience sample where subjects, who are usually not representative of the entire population, self- select themselves for the sample is called a ________________________. Volunteer sample 21. When results from a sample are not representative of the population, the sample is said to exhibit ____________. Bias 2
mw: Math 112 Genl Stats Test 2 Review: Chapters 4, 5, & 6 22. Types of Bias in Sample Surveys: a.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern