Question
In: Statistics and Probability
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 2 years agoRelated Solutions
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