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Unformatted text preview: Problem 1. The mean area of several thousand apartments in a new development is advertised to be 1250 square feet. A tenant group thinks that the apartments are smaller than advertised. They hire an engineer to measure a sample of apartments to test their suspicion. What are the null hypothesis Ho and alternative hypothesis Ha? Answer: Ho: µ = 1250 square feet Ha: µ < 1250 square feet Problem 2. Each of the following paragraphs calls for a statistical test about a population mean µ. State the null hypothesis H0 and the alternative hypothesis Ha in each case, and classify the hypothesis test as two-tailed, left tailed, or right-tailed. 1. The diameter of a spindle in a small motor is supposed to be 5 mm. If the spindle is either too small or too large, the motor will not work properly. The manufacturer measures the diameter in a sample of motors to determine whether the mean diameter has moved away from the target....
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This note was uploaded on 06/09/2011 for the course STAT 113 taught by Professor Thaler during the Spring '11 term at CUNY Hunter.
- Spring '11