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A random sample of measurements on two quantitative variables x and y is taken from a population.
The data for the variables x and y are: {(x, y) | (2, 1), (3, 2), (4, 3), (5, 5)}. Assume that x is an Independent variable and y is a dependent variable. Calculate the Pearson correlation coefficient. What does the correlation mean? Is the correlation statistically significant at the 5% level? What is the effect size? What is the coefficient of determination?
A random sample of 400 observations produced a sample proportion of 0.32. What is the standard error to construct a 99.5% confidence interval.
Let the null hypothesis be the landlord association claim and the alternative hypothesis be the housing authority claim. Doe the data support the landlord's association claim? What would you report to the housing authority?
The length of time to do a complete full service oil change at Speedy-Lube is normally distributed with a mean of 15.8 minutes and a standard deviation of 2.2 minutes
Assume men's weights are normally distributed w/ a mean of 172 lb. and a s.d. of 29lb.
There are four conditions/requirements that must be met in order to perform simple linear regression. For each of the conditions below, choose the technique that should be used to determine whether or not that the condition is met.
The participants in a television quiz show are picked from a large pool of applicants with approximately 60% men and 40% women. X is a random variable that gives the number of females chosen when ten participants are picked randomly.
Simulate this problem using the Monte Carlo process. Show the demand during lead time (DDLT) for 30 reorders and determine the expected demand during lead time.
A pediatrician is interested in studying the effect of Motrin on reducing temperature in young children. Four children with influenza have their temperatures taken immediately before and then 20 minutes after taking a standard dose
In an article entitled "Fuel Economy Calculations to Be Altered," James R. Healey indicated that the government planned to change how it calculates fuel economy for new cars and trucks.
Estimate the proportion of low birth weight infants whose mothers experienced toxemia during pregnancy. Use 95% confidence level.
If its weekly cost function is C(x)=68,000+150x, how should the manufacturer set the size of the rebate in order to maximize its profit?
The diameters of oranges in the certain orchard are normally distributed with the mean of 5.26 inches and a standard deviation of 0.50 inches.
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