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Using your favorite statistics software package, you generate a scatter plot with a regression equation and correlation coefficient. The regression equation is reported as y= -69.94x+78.25 and the r=-0.325.
What proportion of the variation in y can be explained by the variation in the values of x?
r² = _____ % (Report answer as a percentage accurate to one decimal place.)
The simulator models the spread of a disease across a population over the course of 100 days. We will be using this application to simulate an outbreak of Ebola in a high density region. According to research Ebola has a transmission rate of 15% a..
To find the probabilities values of standard normal variable
Is there any evidence to suggest that the new boarding procedure has decreased the population mean boarding time? Use a = 0.05, and assume the populations.
Sun Love grapefruit growers have determined that the diameters of their grapefruits are normally distributed with a mean of 4.5 inches and a standard deviation of 0.3 inches.
For a local charity, the donations in dollars received during the last month were 5, 10, 15, 20, 25, 50 having the frequencies 20, 30, 10, 40, 50, 5. Compute the mean, variance and standard deviation.
If probability of getting sample mean x less than unreported sample mean is 0.025, determine value of the unreported sample mean?
Consider the following and determine what type of variable each best represents: the number of private houses built last year.
question the average annual total return for u.s. diversified equity mutual funds from 1999 to 2003 was 4.1
Suppose an engineer proposes a new model that will weigh 3100 pounds. What could we expect the miles per gallon in the city performance would be?
Much has been written about the relationship between students' SAT test scores and their family's income. Generally speaking, there is a strong positive correlation between income and SAT scores. Consider and discuss the following questions as y..
Please calculate the 95% standard deviation for each department and indicate for me if any department is receiving on average $2k or more on the high end.
a. What is the probability that the husband and the wife smoke? b. What is the probability that the husband smokes and the wife does not smoke?
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