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In a lot of 200 electrical fuses, 20 are known to be nonconforming. A sample of 10 fuses is selected.
(a) What is the probability distribution of the number of nonconforming fuses in the sample? What are its mean and standard deviation?
(b) Using the binomial distribution as an approximation to the hypergeometric, find the probability of getting 2 nonconforming fuses. What is the probability of getting at most 2 nonconforming fuses?
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.500 inches.
Which of the following is a correct statement about a probability? A. It may range from 0 to 1. B. It may assume negative values. 1. Which of the following is a correct statement about a probability?
Suppose a study is conducted to test the claim, at a 0.01 significance level, that less than 75% of college students spend less than $250 per semester on text books. A survey of 700 students found that 71% spent less than $250 per semester on text..
If in a random poll of 250 residents, 150 residents were in favor, how accurate is this result as an estimate of the proportion?
In a few sentences, describe two designs that can address your research question. The designs must involve two different statistical analyses.
question the playing times of songs are normally distributed. listed below are the playing times in seconds of 10 songs
Construct a 95% confidence interval for the proportion of adults from the West who say traffic congestion is a serious problem.
A survey showed that 23% of college students read newspapers on a regular basis and that 81% of college students regularly watch the news on TV. The survey also showed that 20% of college students both follow TV news regularly and read newspapers ..
Regression line drawn as y = c + 1075x, when x was 2, and y was 239, given that y intercept was 11. Calculate the residual
fine motor skills were measured in a sample of kindergarteners before and after 6 months of occupational therapy.
Distinguish among classical or a priori probability, relative frequency or empirical probabil- ity, and subjective or personalistic probability. What is the disadvantage of each?
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