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  3. 1. a. a researcher wishes to estimate the proporti

1. a. A researcher wishes to estimate the proportion of adults who have? high-speed Internet access. What...

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Basic Math

1.

a. A researcher wishes to estimate the proportion of adults whohave? high-speed Internet access. What size sample should beobtained if she wishes the estimate to be within 0.3 with 99%confidence?

b.

it is believed that people prefer rubies over other gems. In arecent simple random survey of 150 people, 63 said they wouldprefer a ruby over other gems. Use this sample data to complete ahypothesis test to determine if a majority of people would prefer aruby. over other gems at the 0.01 significance level.

Be sure to include all the steps for a complete hypothesis test- start and end in context, test conditions, show formulas andnumbers used, clearly state REJECT or FAIL TO reject.

c.

If 12 jurors are randomly selected from a population that is 45%Hispanic, what is the probability that 2 or fewer jurors will beHispanic?

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