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Testing for a linear correlation. Construct a scatter plot, find the value of the linear correlation coefficient r, and find the critical values of r from the table below using a=0.05. Determine whether the is sufficient evidence to supporta claim of a linear correlation between the two variables.
CPI and Pizza; The paired values of the consumer pice index and a slice of pizza:
cpi 30.2 48.3 112.3 162.2 191.9 197.8
pizza 0.15 0.35 1.00 1.25 1.75 2.00
The mean return for a random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Build a 95 percent confidence interval for mu, population mean.
How large sample should be selected in order to obtain p estimate with a bound of 0.08 on the error of estimation.
A random variable X is normally distributed with mu = 60 and standard XXX = 11. What is zscore for X = 71
The 99% confidence interval estimating the proportion of all students at the university who prefer outdoor exercise is given by which of the following?
Compare your best difference to the result from an ordinary two-sample t-test between these groups. Comment the difference.
Graph the least-squares line on your scatter diagram. Be sure to use the point (x, y) as one of the points on the line.
A business operates with 9 locations. Each year, each location is allotted an overtime budget based on the previous years' activity. The total overtime budget for all 9 locations is $10 million.
Determine SSE, SS (Total) and the explained sum of squared variation SSR and find the estimated y intercept slope and write the regression equation.
Determine a 95% confidence interval for the true mean weight of such boxes?
What is the predicted GPA if a person watches 12 hours of television per week?
Make a histogram showing the probabilties of r = 0, 1, 2, 3, 4, 5, 6, 7 or 8 defective syringes in a random sample of 8 syringes.
Detremine the mean, standard deviation, and variance for this frequency distribution.
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