QUIZ+3+Solutions

QUIZ+3+Solutions - Spring 2008 Math 1070 Elementary...

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Math 1070 – Elementary Statistics Name_________________________________________Class meeting time:_________ QUIZ #3 Directions: 1 Be sure to answer all the questions 2 Present all your work in a logical manner, stapling all other material as required 3 For multiple choice questions, select only the answer you think is correct multiple answers are not accepted 4 Each of questions 1-20 is worth 4 points, The other required material is worth 20 points 1. What is a sample of size n chosen in such a way that every set of n units in the population has an equal chance to be the sample actually selected called? a. simple random sample b. block design c. comparative study d. stratified sample 2. What is bias? a. racial prejudice on the part of the experimenters b. systematic error in the way a sample presents a population c. falsified data, resulting from pre-conceived ideas about the results d. a situation which two errors cancel one another 3. What is a sample which consists of the entire population called? a. stratum b. multistage sample c. census d. none of the above. A sample can never be the entire population 4. A member of Congress wants to know what his constituents think of proposed legislation on health insurance. His staff reports that 228 letters have been received on the subject, of which 193 oppose the legislation. What is the sample in this situation? a. the constituents b. the 228 letters received c. the 193 opposing the legislation d. Congress 5. A member of Congress wants to know what his constituents think of proposed legislation on health insurance. His staff reports that 228 letters have been received on the subject, of which 193 oppose the legislation. What is the population in this situation? a. the constituents
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QUIZ+3+Solutions - Spring 2008 Math 1070 Elementary...

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