Question: The average size of a home in 2008 fell to
The average size of a home in 2008 fell to 2343 square feet, according to the National Association of Home Builders and reported in USA Today (January 11, 2009). The homebuilders of a northeastern city feel that the average size of homes continues to grow each year. To test their claim, a random sample of 45 new homes was selected and revealed an average of 2490 square feet. Assuming that the population standard deviation is approximately 450 square feet, is there evidence that the average size is larger in the northeast compared to the national 2008 figure? Use a 0.05 level of significance.
Answer to relevant QuestionsFrom candy to jewelry to flowers, the average consumer was expected to spend $123.89 for Mother’s Day 2009, according to an April 2009 National Retail Federation’s survey. Local merchants felt this average was too high ...The National Health and Nutrition Examination Survey (NHANES) indicates that more U.S. adults are becoming either overweight or obese, which is defined as having a body mass index (BMI) of 25 or more. Data from the Centers ...Suppose you wanted to test the hypothesis that the mean minimum home service call charge for plumbers is at most $95 in your are a. Explain the conditions that would exist if you made an error in decision by committing a a. ...The null hypothesis, Ho: µ = 250, was tested against the alternative hypothesis, Ha: µ < 250 .A sample of resulted in a calculated test statistic of z = - 1.18 . If s = 22.6, find the value of the sample mean, . Find the ...The following computer output was used to complete a hypothesis test. a. State the null and alternative hypotheses. b. If the test is completed using a = 0.05 , what decision and conclusion are reached? c. Verify the ...
Post your question