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A company makes toys that are either working or not working. There is an imperfect test run on the toys.
800 toys are randomly chosen
The toys are tested with the imperfect test, then humanly checked to see if the answer was right.
448 are working and test as working.
60 are not working but test as working.
112 are working but test as not working.
180 are not working and test as not working.
a) What is the probability an item tests as working?
b) What is the probability of the test giving the right answer?
Do winning teams generally enjoy greater attendance at their home games? Describe the association.- Is attendance more strongly associated with winning or scoring runs? Explain.
suppose certain coins have weights that are normally distributed with a mean of 5.319 g and a standard deviation of
What is the difference between an experiment and an observation?
Calculate the value of a Rs. 5,000 (par value) bond paying interest at an annual coupon interest rate of 10% with 10 years maturity.
The specification limits are set between 15.8 and 16.2 ounces.
Define null hypothesis, alternative hypothesis, level of significance, test statistic, p value, and statistical significance.
The length of time a particular smartphone's battery lasts follows an exponential distribution with a mean of ten months.
Mounting-hole distances. Figure 27.10 (page 27-23) displays a record sheet for 18 samples of distances between mounting holes in an electrical meter. The data file adds and s for each sample.
a man claims to have extrasensory perception. as a test a fair coin is flipped 26 times and the man is asked to predict
two airplanes are flying in the same direction in adjacent parallel corridors. at time t 0 the first airplane is 10 km
Assuming that among the 1048 respondents, there were an equal number of men and women, construct a 95% confidence interval for the difference in these proportions.
What are the mean and standard deviation of the average loss for 14 policies? (Round your standard deviation to two decimal places.)
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