Project #5601 - Statistics

1. You wish to estimate, with 95% certainty, the mean of a normal population of ages to within 3 and 1/2 years. This population is known to have a standard deviation of 11.4 years. What is the smallest size sample you can use

If we wish 90% certainty, will the sample size be greater than or less than the answer you just got?

 

2. You wish to estimate, with 95% certainty, the proportion of Tennessee residents who hold a certain opinion to within 2 and 1/2 percentage points. In your final sampling, it will cost $8.85 per contact. You have the option to take a preliminary survey for $2450.00. How much money will you save if you take the preliminary sample and it indicates the true proportion is approximatelt 0.20?

Subject Mathematics
Due By (Pacific Time) 05/05/2013 07:00 pm
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