Sampling and Non-Sampling Errors

Some doctors who did not give any charity care may say that they did. If so, the study suffers from

• a large margin of error to take account of possible failure to be truthful.
• sampling errors that require a better random sampling design.
• bias: the sample result will systematically underestimate thetrue percent of doctors who give charity care.
• bias: the sample result will systematically overestimate thetrue percent of doctors who give charity care.

Tags

CCSS.HSS.IC.B.3

A census is

• a simple random sample from the population.
• a count of a nation's people.
• a sample that does not use chance selection.
• a sample that attempts to include the entire population.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A radio talk show invites listeners to call a telephone number to vote "Yes" or "No" on whether they support a bond issue for anew school. About 1500 people call in. Over 80% say "No." As an estimate of community opinion, this result is

• accurate to within 3% with 95% confidence.
• not precise because the sample size 1500 is too small.
• unethical due to lack of informed consent.
• badly biased due to voluntary response.

Tags

CCSS.HSS.IC.B.3

Exit polls (where the surveyor asks those who are leaving the poll booths on election day) are a form of:

• Voluntary Response
• Convenience Sampling
• Simple Random Sampling
• Systematic Sampling

Tags

CCSS.7.SP.A.1

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.
She selects the first five who raise their hands.

• Systematic
• Convenience
• Voluntary Response
• Simple Random

Tags

CCSS.7.SP.A.1

Source of bias in which people CHOOSE to respond and usually only people with very strong opinions respond

• Response Bias
• Undercoverage
• Convenience Sampling
• Voluntary Response

Tags

CCSS.RL.11-12.6

Source of bias in which some groups of populations are LEFT OUT of the selection process

• Response Bias
• Undercoverage
• Convenience Sampling
• Voluntary Response

Tags

CCSS.7.SP.A.1

Source of bias that occurs when an individual chosen for the sample CAN'T be contacted or refuses to cooperate.

• Response Bias
• Undercoverage
• Nonresponse
• Voluntary Response

Tags

CCSS.RL.11-12.6

Source of bias that occurs when you ask people who are EASY to ask

• Response Bias
• Convenience Sampling
• Nonresponse
• Voluntary Response

Tags

CCSS.RL.11-12.6

The process of gathering information/data from EACH member of the population.

• Census
• Interview
• Survey
• Questionnaire

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2