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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 twotailed, left tailed, or righttailed. 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
 Thaler

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