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In a recent study of incomes in Allegheny county in Pennsylvania it was found that distribution of family incomes is skew to the right. what can we say about the relationship between mean and median?
Sampling distributions. Given a normal distribution with μ = 50 and standard deviation σ = 9, if a sample of n = 100 is selected.
Letting μ be the mean composite satisfaction rating for the gaming console, we find that the test should be H o : μ ≤ 42 versus H a : μ > 42
The sampling distribution of mean score is approximately Normal. It has mean. What is its standard deviation?
Describe the Linear programming problem with constraints. Which among the following is not acceptable as a constraint in a linear programming problem?
The diameters of bolts produced by a certain machine are normally distributed with a mean of 0.30 Inches and a standard deviation of 0.01 inches.
For the data shown below, prepare a x-bar chart. Note that the sample size is three. Record the values for the UCL, center line, and LCL. In addition, note any points that are out of control.
We are interested in determining if the accident proportions differ between the two age groups:
Assume that the number of left-handers is a binomial random variable. (Refer to the formula for mean and standard deviation for binomial prob. Distribution)
Develop a hypothesis to investigate this problem based on the claim of the heat pump manufacturer
Assuming the sigma of 200 was actually the standard deviation for the sample, recalculate the interval estimate. Discuss how this changed your result from that in part b.
Obtain a test statistic and p-value. Interpret the results at = .01.
Carryout the ANOVA and, if essential, post-hoc comparisons. Conduct a graph to represent group differences, and interpret ANOVA in a paragraph written in APA style.
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