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For adults, there is a positive association between weight and height. For used cars, there is a negative association between the age of the car and the selling price. Explain what it means for two variables to have a positive association.
Explain what it means when two variables have a negative association. What is an example of two variables that would have no association?
Estimate descriptive statistics for each investment via Excel. Compare the two investments. Be sure to comment on the central tendency, variability and shape of these two investments (Note: use the most appropriate measure when comparing the varia..
You choose random sample of 50 cans, and mean amount of paint per 1-gallon can is 0.995 gallon. Is there evidence that mean amount is different from 1.0 gallon (use α=0.01).
The American Bankers Association collects data on the use of credit cards, debit cards, personal checks, and cash when consumers pay for in-store purchases (The Wall Street Journal, December 16, 2003). In 1999, the following usages were reported.
the following observations show the number of traffic violations given for speeding on the one interstate highway going
What value of the sample proportion, p Hat, is required to reject the null hypothesis, given the following sample sizes?
Wwhat are our h0 and ha ? (c) compute zobt.(d) with a= .05, what is zcrit? (E) do we have evidence of a relationship in the population? if so describe the relationship.
Write a memo explaining what the regression means. If the average water hardness is 3 and the chief would like to replace any pump with a probability of failing of .80 or more, at what age should pumps be replaced?
Consider a bivariate data set and imagine that the data are projected onto the x-axis and then checks for outliers are made using the MADmedian rule. The same is done when projecting the data onto the y-axis and both times no outliers are found. ..
a cereal manufacturer has a machine that fills the boxes. boxes are labeled 16 oz so the company wants to have that
A man buys a car for £4500 and pays a deposit of 20 per cent. Interest is charged 2.5 per cent on the outstanding balance. He repays this balance over 24 months. How much is the monthly instalment (to the nearest penny)?
is the accounting system the same for a merchandising business and a service business?
What can you learn about the distribution of the installation process? Does it appear that the country has an impact on installation time? Why or why not?
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