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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 = $230. What is the minimum required sample size to estimate μ with a margin of error less than or equal to $100? (Remember to express your answer as a whole number.)
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This note was uploaded on 02/01/2010 for the course PAM 2100 taught by Professor Abdus,s. during the Spring '08 term at Cornell University (Engineering School).

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