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Assume a researcher compared the performance of four independent groups of participants on an ordinal variable using the Kruskal-Wallis H test. Each group had eight participants.
a. What is the df associated with this test?
b. Using a p level of 0.05 and a two-tailed test, what is the critical value?
c. Assume the researcher calculated H = 9.26. Make a decision regarding the null hypothesis and explain that decision.
d. Assume the researcher calculated H = 3.97. Make a decision regarding the null hypothesis and explain that decision.
A random sample of patients who received a hip transplant operation at Stanford University Hospital during 2000 to 2010 will be followed for 10 years.
Construct a times series plot. What type of pattern exists in the data and use trial and error to find a value of the exponential smoothing coefficient α that results in a relatively small MSE
Suppose that we have a Poisson customer source, which has an arrival rate of 10 customers per hour.
assume that adults have iq scores that are normally distributed with a mean of 100 and a standard deviation of 15. find
a study was recently conducted at a major university to determine whether there is a difference in the proportion of
Where you are calculating the value of uncertain outcomes (probability nodes on the diagram), do this by multiplying the value of the outcomes by their probability. The total for that node of the tree is the total of these values.
The following data are daily percentage changes in stock prices for 20 stocks called "The Favorites."- Draw a box plot of these data.
For 95% confidence that the sample mean will not differ from the actual population mean by more than 0.1 ounces, what sample size is required?
Refer to the Heating equipment data set in Appendix C.8 .The observations are listed in. time of der. Develop a reasonable predict of model for the monthly heating equipment order s;' Potential predictors include new homes for sale. current m..
If np ≥ 5 and nq ≥ 5, estimate P (more than 5) with n=14 and p=0.3 by using the normal distribution as an approximation to the binomial distribution; if np
Using ANOVA summary table, find out if regression model is significant.
A popular snack is packed by machine into 9-ounce boxes. The distribution of box weights is normally distributed with a mean of 9 ounces and a variance of 0.01 ounces. What is the probability of randomly selecting a box containing less than 8.9 ou..
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