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The national median sales price for new single-family homes is $230,000 (The Associated Press, March 25, 2006). Assume that the following data were obtained for sales of existing single-family homes in Houston and Boston.
Greater than $230,000 Equal to $230,000 Less than $230,000
Houston 11 2 32Boston 27 1 13
a. Is the median resale price in Houston lower than the national median of $230,000? Use a statistical test with ? = 0.05 to support your conclusion
b. Is the median resale price in Boston higher than the national median of $230,000? Use a statistical test with ? = 0.05 to support your conclusion
To determine whether two categorical variables are independent, one should use the:
Consider a large population of families with three children each. If the genders of children in any family are independent of one another, the number of male children in any family will have a binomial distribution based on three trials.
The probability is 90% that the sample percentage will be contained within what symmetrical limits of the population percentage?
While dealing with 16 students, suppose that the alternative hypothesis has been one-sided and that it was set as Ha :
The standard deviation of is usually called the A. randomized standard error B. standard error of the sample C. standard error of the population D. standard error of the mean
The sums of squares were computed as SSW = 4773.3 and SSA = 591.2. Use the F test of ANOVA (assume α = 0.05) to decide whether or not there are any differences in true average lumen outputs between the three brands for this type of light bulb.
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
High School GPA is normally distributed with a mean of 3.06 and a standard deviation of 0.40. The probability of a randomly chosen student having a HS GPA between 3.54 and 3.80 is
Solve different inventory control problems using an appropriate OR method.
The mean return for a random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Build a 95 percent confidence interval for mu, population mean.
The ANOVA procedure is a statistical approach for determining whether or not:
What does confidence interval tell you? What does it mean? What 2 things can a researcher do to decrease width of a confidence interval? What are the effects?
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