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Find an example of a poll result in a newspaper or magazine and choose one result of the poll to discuss. For example, I found a Seattle Times article reporting on a poll by The Associated Press-NORC Center for Public Affairs Research showing that 72% of parents in low-income families are at least somewhat concerned about their child falling behind academically while schools are closed during the pandemic.
Find your own example and read the article to see how the poll information is presented. Then answer the following questions.
-What population is the poll supposed to represent?
-Does the poll result you found represent a sample statistic or a population parameter? How do you know? Does the article do good job explaining whether the results are based on a sample or the entire population of interest?
-Is the poll result presented in the article as a point estimate or a confidence interval? How do you know this?
-What other information would you like to have to assess the quality of the poll and the inference made from the poll?
The following are annual incomes (in thousands of dollars) for randomly chosen, U.S adults employed full-time:
A recent report criticizes SAT-testpreparation providers for promising big score gains without any hard data to back up such claims.
What is the UPPER bound for the confidence interval?
Read the following document and identify the probable gender of the author, citing textual evidence for your conclusions.
A company is interested in knowing which are the potential sales next year if you use $ 20,000 in advertising expenses. The company uses the information from previous years to make its sales forecast.
in a community 40 of the population is smoker. i randomly choose 60 residents from that community and ask if each of
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Check that the left hand side of (9) is the standardized slope. Hint: work out the correlation coefficient between the weights and the lengths.
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