A researcher wishes to estimate, with 99 confidence, thepopulation p...

A researcher wishes toâ€‹ estimate, with 99 â€‹% â€‹confidence, the population proportion of adults who think...

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A researcher wishes toâ€‹ estimate, with 99 â€‹% â€‹confidence, thepopulation proportion of adults who think Congress is doing a goodor excellent job. Her estimate must be accurate within 2 â€‹% of thetrue proportion. â€‹(a) No preliminary estimate is available. Findthe minimum sample size needed. â€‹(b) Find the minimum sample sizeâ€‹needed, using a prior study that found that 28 â€‹% of therespondents said they think Congress is doing a good or excellentjob. â€‹(c) Compare the results from partsâ€‹ (a) andâ€‹ (b).

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Step 1 Using the data given in the question figure out the following variables za2 Divide the confidence interval by two and look that area up in the ztable 99 2 0495 The closest See Answer

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