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Find the equation of the Least Squares Regression line if:
x-bar = 10
sx= 2.3
y-bar = 40
sy = 4.1
r = -0.56
A. y-hat = 49.98x - 0.998 B. y-hat = 49.98 - 0.998x C. y-hat = 30.2x +0.998 D. y-hat = 30.2 - 0.998x
in studies for a medication 13 percent of patients gain weight as a side effect. suppose 514 patients are randomly
Suppose that nine additional firms will be added to the bankruptcy rolls during the next quarter. How many of those failures are likely to be attribute to fraud?
The Ohio Department of Agriculture tested 203 fuel samples across the state in 1999 for accuracy of the reported octane level. For premium grade, 14 out of 105 samples failed
Give an example of how to use a t-test to analyze the data from the Table of Variables and list the grouping variable and continuous variable that you would include in the analysis
a local trucking company fitted a regression to relate the travel time days of its shipments as a function of the
the price of a baby tiger has a mean of 115000 and a standard deviation of 25000. a random sample of 16 cubs from a zoo
Security B has an expected return of 12 percent, a standard deviation of returns of 10 percent, a correlation with the market of 0.7 and a beta coefficient of 1.0.
for each class interval of the frequency distribution given determine the class midpoint the relative frequency and
Analyze and support whether you believe that the changes recommended are statistically valid and sound enough to make practice changes in a hospital for the two papers listed below. Also in your answer please touch on the following items
Bags of cookies that have weights in the upper 7.5% are too heavy and must be repackaged. What is the most a bag of cookies can weigh and not need repackaging?
Can the company conclude that the pill is effective at promoting weight loss? Write the hypotheses and conduct the appropriate hypothesis test.
How would you explain the analysis of variance, assuming that your audience has not had a statistics class before?
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