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A pharmaceutical manufacturer wants to determine the concentration of a key component of cough medicine that may be used without the drug's causing adverse side effects. As part of the analysis, a random sample of 45 patients is administered doses of varying concentration (X ), and the severity of side effects (Y ) is measured. The results include x‾= 88.9, y‾ = 165.3, SSX = 2,133.9, SSXY = 4,502.53, SSY = 12,500. Find the least-squares estimates of the regression parameters.
X: 27 39 73 66 33 43 47 55 60 68 70 75 82
Y: 2 3 10 9 4 6 5 8 7 9 10 13 12
Estimate the simple linear regression relationship between market share and product quality rating.
What would happen to the size and the sign of the correlation coefficient if we correlated these two variables? How can researchers work around this issue?
How does sample size affect the interpretation of survey results?- Distinguish between probability and nonprobability sampling techniques. What are the implications of each?
The sample showed an average of 56.2 miles per gallon with a standard deviation of 5 miles per gallon. With a 0.05 level of significance, do you accept or reject the manufacturer's claim.
A process has a capability index of 0.40. This index is interpreted to mean that the process is:
You're operating a business in very competitive market. You're not yet the dominant player, but you have invested heavily in marketing and product development and it has paid off with a steady growth rate of 10%.
Suppose that 80% of all batteries have acceptable voltages, and let y denote the number of batteries that must be tested. What is p(2), that is, P(y=2).
use a table of t-values to estimate the p-value for the specified one-mean t-test. two tailed test n 26 t
According to a report by Scarborough Research, the average monthly household cellular phone bill is $73. Suppose local monthly household cell phone bills are normally distributed with a standard deviation of $11.35.
27% fall into both categories. What is the probability a randomly selected student commutes and does not participate in a student organization?
brief discussion telling why you chose this particular data set to study. As in discussion two, I am hoping that you will choose data that has some relevance to your life.
a horizontal pipe is 100 m long with a diameter of 0.6 m. the pipe carries a steady flow of water of 0.5 m3s. the gage
The thickness of photoresist applied to wafers in semiconductor manufacturing at a particular location on the wafer is uniformly distributed between 0.2050 and 0.2150 micrometers.
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