Mathematics, 02.12.2019 19:31 mzynique2000
Atelephone poll of a simple random sample of 1234 adults found that 62% are generally satisfied with their lives. the announced margin of error for the poll was 3%.
does the margin of error account for the fact that some adults will lie about life satisfaction when talking to strangers over the phone?
a) yes. the margin of error includes all sources of error in the poll.
b) yes. taking a simple random sample eliminates any possible bias in estimating the population proportion.
c) no. the margin of error only includes sampling variability
Answers: 1
Mathematics, 21.06.2019 22:20
The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22
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Mathematics, 21.06.2019 22:30
Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319
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Mathematics, 21.06.2019 23:40
For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?
Answers: 1
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