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# PS 10 - INTRODUCTION TO...

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INTRODUCTION TO STATISTICS (PAM2100-001-LEWIS-FALL2009) > TAKE ASSESSMENT: PS 10 Take Assessment: ps 10 Name ps 10 Instructions Multiple Attempts Not allowed. This Test can only be taken once. Force Completion This Test can be saved and resumed later. Question Completion Status: Question 1 1 points Save The mean monthly rent for a random sample of 20 apartments advertised in the local newspaper is \$1200. The population standard deviation σ = \$200. Using this data, a 99% confidence interval for the population mean rent is constructed. What is the margin of error (rounded to three decimal places ) associated with this confidence interval? Question 2 1 points Save Suppose we wish to calculate a 90% confidence interval for the mean monthly rent of all apartments in New York. The desired margin of error is \$100. Assume that the population standard deviation σ = \$230. What is the minimum required sample size to estimate μ with a margin of error less than or equal to \$100?

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