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The numbers 0 through 9 are used in code groups of two to identify an item of clothing. Code 83 might identify a blue blouse, size medium. The code group 46 might identify a pair of pants, size 18, and so on. Repetitions of numbers are not permitted, i.e., the same number cannot be used more than once in a total sequence. As examples, 27, 94 or 55 would not be permitted. How many different code groups can be designed?
Find out the least-squares regression line and interpret its slope.
Using the appropriate statistical procedure on the SPSS, test the between group means for a significant difference.
If a blue ball is selected you win nothing. Let X be the amount that you win. The expected value of X and let the random variable X be a random number with the uniform density curve given below
A researcher used stepwise regression to create regression models to predict Birthrate (births per 1000) using five predictors:
Do the data demonstrate that the true mean photometer reading for the color density is significantly different from 12 at 3 percent level of significance?
Conduct an analysis of variance
Calculate a 3-period moving average for period 7. Compute the MAD of the forecast.
The height and diameter of 31 trees of a certain species were measured, the trees were cut down, and the volume of usable lumber was determined. Find the explanatory variable(s) in this study are
They wish to conduct a survey of their students and find a simple random sample of 50 Freshmen, 40 Sophomores, 35 Juniors, and 30 Seniors.
Find the probability that fewer than 10 of those sampled currently have access to online services.
Describe what the researcher must do if one of the requirements is not met and give illustrations.
Using goodness-of-fit test and.01 level of significance, find out whether accidents are evenly distributed all through the day. Write a short description of your conclusion.
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