in a Gallup Poll of 557 randomly selected adults , 284 they were underpaid a) Identify...

in a Gallup Poll of 557 randomly selected adults , 284 they were underpaid

a) Identify the best point estimate for the population paramater where we are referring to the population proportion of adults who belive they are underpaid

b ) Construct a 95 % Confidence Interval estimate for the percentage of adults who feel that they are underpaid

c) Does your analysis you to conclude that more than 50% of adults feel underp Explain why or why not ?

d ) (bonus ) Describe at least one potential sorce of statistical bias in this poll.

Solutions

Expert Solution

c) The 95% confidence interval is (0.4683, 0.5515). The confidence interval contains 0.50. If we consider the upper confidence limit is 0.5515 that means around 55%. Thus we can conclude more than 50% adults are underpaid. However not more than 55%.

d) One source of bias is the sample size. The sample size is not satisfactory for drawing inference about the American population.

orchestra answered 1 year ago

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