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A cork intended for use in a wine bottle is considered acceptable if its diameter is between 2.9 cm and 3.1 cm (so the lower specification limit is LSL = 2.9 and the upper specification limit is USL = 3.1).
a. If cork diameter is a normally distributed variable with mean value 3.04 cm and standard deviation .02 cm, what is the probability that a randomly selected cork will conform to specification?
b. If instead the mean value is 3.00 and the standard deviation is .05, is the probability of conforming to specification smaller or larger than it was in (a)?
A major problem resulting from the lack of randomization in a cohort study is: the possibility that a factor that led to the exposure, rather than the exposure itself, might have caused the disease.
each computer chip made in a certain plant will independently be defective with probability .25. if a sample of 1000
A banks loan officer rates applicants for credit. The ratings are causally distributed with a mean of 200 also a standard deflation of 50.
(a) Does the population have to be normally distributed to test this hypothesis by using the methods presented in this section? Why? (b) If = 48.3 and s = 8.5, compute the test statistic. (c) Draw a t-distribution with the area that represents the ..
Suppose a geyser has a mean time between eruptions of 68 minutes. Let the interval oftime between the eruptions be normally distributed with standard deviation 26minutes. (round everything to four decimal places)
question the student population at the state college consists of 55 females and 45 males.a. the college
Fitting of simple linear regression equation - Given the student population for a school district over the past few years, find the prediction equation for this data.
Suppose we found the correlation coefficient between two variables, X and Y, to be r = 0.95. Which of the following is most appropriate?
1.i plan an experiment to test the latest conflicting diet programs. the factor for diet will involve three different
If W denotes the total number of spaces one moves under these special conditions, find the mean and standard deviation of W.
suppose the age distribution in sydney is as followsunder 18 2218-25 1826-50 3651-65 10over 65 14total 100a researcher
from their 50 data points washington dc not in the study the researchers calculated a correlation of 0.988. based on
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