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When circuit boards used in the manufacture of compact disc players are tested, the long-run percentage of defectives is 5%. Let X = the number of defective boards in a random sample of size? = 25.
a. Determine P(X ? 3).
b. Determine P(X ? 8).
c. What is the probability that exactly 5 of the 25 boards are defective (i.e., P(X = 5))?
d. Calculate the expected value and variance of X.
Which of the following is true regarding ANOVA? a) It is used to test for a difference in medians among three or more populations
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a box contains 10 chips. the chips are numbered 1 through 10. otherwise the chips are identical. from this box we draw
question the police chief in montgomery wants to know if the citys population feels that the police are doing a good
Suppose a small bicycle manufacturer makes cheap bikes that sell for 180$ each. The total cost of producing x bikes (in $) is given by c(x)=6000+240x-0.8x^2, where x is up to 200 bikes.
A computer diskette manufacturer is concerned that some diskettes have bad sectors that would cause a diskette to hold less information than it was intended to hold.
Results of a statistical survey and analyze processed data and what proportion of homes subscribe to telephone service from Ashland? Would you say this portion is small, medium, or large?
Create a histogram showing the distribution of symptom scores in this sample. Is this a skewed distribution? If so, is it skewed to the left or to the right?
Evolutionary theories often, Emphasize that humans have adapted to their physical environment. One such theory hypothesis that:
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An F statistic is any statistic that follows an F distribution. Which of the following are true about F statistics and f distribution? Select all that apply
The standard screening test for Down's Syndrome is based on combination of maternal age and the level of serum alpha-fetoprotein. Using this test 80% of Down's syndrome cases can be identified, while 5 % of normals are detected as positive.
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