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A study of net sales of the sample of small corporations revealed that mean net sales is $2.1 million, median $2.4 million, modal sales $2.6 million and standard deviation of distribution is $500,000. Determine the Pearson's coefficient of skewness?
A.-9.1B.+6.3C.-3.9D.+2.4E.None of the above
For the following data, determine whether or not right-hemisphere damage results in significantly reduced performance on the spatial skills task. Test with alpha set at .05 with one tail. The data are as follows:
The average price of a sample of 12 bottles of diet salad dressing taken from different stores is $1.43. The standard deviation is $0.09. The average price of a sample of 16 low-calorie frozen desserts is $1.03.
In a regression model involving 30 observations, the following estimated regression equation was obtained:
Explain the difference between the null and alternative hypothesis. Which one can be proven in a statistical sense?
Perform the indicated test of hypothesis. HO: M 7, given x= 0.01, N=25, Xbar = 7.019 and SD is =.1681. Assume the sample is selected from a normally distributed population.
I have the t-score of 1.660 an a standard error of .036. I hope they are correct, but also need the test effect and test statistic, p-value.
Following data from an x bar chart, is the process capable (capability index>1.33)?
Construct three scatter plots for: (1) percentage alcohol versus calories, (2) percentage alcohol verses carbobydrates, and (3) calories versus carbohydrates
Construct a 95% confidence interval for the proportion of red candies. Using your same data determine if the proportion of green candies in a package of M&Ms is differen than what is claimed by the company.
The average public elementary school has 450 students. assume the stand deviation of the distribution is 99. if a random sample of 36 public elementary schools is selected, find the probability that the number of students enrolled is between 445 a..
Find out the coefficient of determination, r 2 , and interpret its meaning.
Test whether there is significant difference in the test anxiety level of the three groups using nonparametric test.
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