hello quizlet
Home
Subjects
Expert solutions
Create
Study sets, textbooks, questions
Log in
Sign up
Upgrade to remove ads
Only $35.99/year
Math
Statistics
Stats Chapter 12
Flashcards
Learn
Test
Match
Flashcards
Learn
Test
Match
Terms in this set (16)
Population
The entire group of individuals
Sample Size
the number of individuals in a sample
Census
entire population
Voluntary response bias
Bias introduced to a sample when individuals can choose on their own whether to participate in the sample. Samples based on voluntary response are always invalid and cannot be recovered, no matter how large the sample size.
Convenience sample
A convenience sample consists of the individuals who are conveniently available.
Undercoverage
A sampling scheme that biases the sample in a way that gives a part of the population less representation than it has in the population suffers from undercoverage.
Nonresponse bias
Bias introduced when a large fraction of those sampled fails to respond.
Response bias
Anything in a survey design that influences responses falls under the heading of response bias
Pilot
A small trial run of a survey to check whether questions are clear. A pilot study can reduce errors due to ambiguous questions.
Sample
A (representative) subset of a population, examined in hope of learning about the population.
Sample Survey
A study that asks questions of a sample drawn from some population in the hope of learning something about the entire population. Polls taken to assess voter preferences are common sample surveys.
Randomization
The best defense against bias is randomization, in which each individual is given a fair, random chance of selection.
Representative
A sample is said to be representative if the statistics computed from it accurately reflect the corresponding population parameters.
Sampling frame
A list of individuals from whom the sample is drawn is called the sampling frame. Individuals who may be in the population of interest, but who are not in the sampling frame, cannot be included in any sample.
Sampling variability
The natural tendency of randomly drawn samples to differ, one from another. Sometimes, unfortunately, called sampling error, sampling variability is no error at all, but just the natural result of random sampling.
Population Parameter
A numerically valued attribute of a model for a population. We rarely expect to know the true value of a population parameter, but we do hope to estimate it from sampled data. For example, the mean income of all employed people in the country is a population parameter.
Students also viewed
Statistics Final Vocab
31 terms
AP Stats Vocab 2
22 terms
AP Stats Ch 13 Vocab
20 terms
PCHS Integumentary system review
100 terms
Other sets by this creator
Mosaicos (7th Ed) Chapter 0
146 terms
Algo
42 terms
Part 107
131 terms
Monsieur Lazhar
6 terms
Verified questions
pre algebra
Write each percent as a decimal. $$ 4.4\% $$
calculus
identify and determine the nature of the critical points of the given functions. $$ f (x, y) = (x + y)(1 − xy) $$
discrete math
Find the matrix of the relation R on X relative to the ordering given. R={(x,y)|x$\lt$y}; ordering of X: 1, 2, 3, 4
algebra
A local motorcycle repair shop had the following credit-card charges and credits during a recent period. <table> <thead> <tr> <th colspan="2">Sales</th> <th>Refunds</th> </tr> </thead> <tbody> <tr> <td>$7.84</td> <td>$98.56</td> <td>$13.86</td> </tr> <tr> <td>$33.18</td> <td>$318.72</td> <td>$58.97</td> </tr> <tr> <td>$50.76</td> <td>$116.35</td> <td></td> </tr> <tr> <td>$12.72</td> <td>$23.78</td> <td></td> </tr> <tr> <td>$9.36</td> <td>$38.95</td> <td></td> </tr> <tr> <td>$118.68</td> <td>$235.82</td> <td></td> </tr> </tbody> </table> Find the total amount of the credit-card sales.
Other Quizlet sets
Motor Learning Test 1
32 terms
Biology Semester Exam
64 terms
geology exam #2
44 terms
Test Review Unit 4
23 terms