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A product is made up of 20 componets in a series. Ten of the componets have a 1/10,000 chance of failure. Five have a 3/10,000 chance for failure. Four have a 4/10,000 chance for failure. One componet has a 1/100 chance for failur. What is the overall reliability of the product?
The cutoff (or cutoffs), and the score of the sample on this distribution. Then explain your answer to someone who has never had a course in statistics (but who is familiar with mean, standard deviation, and Z scores).
What is the probability the Time/CNN poll will provide a sample proportion within plus-or-minus 0.02 of the population proportion?
A nationwide standardized test taken by high school juniors and seniors may or may not measure academic potential, but we can nonetheless examine the relationship bewteen scores on such test and performance in college.
Infer that the difference in the level of satisfaction with service between the two branches.
Random for a mosquito count, find the probability that the average of those counts is more than 101.6 mosquitos per square meter. Assume that the variable is normally distributed.
Find a 95% confidence interval for the population mean selling price of all homes in this neighborhood.
Frequently, tests tha yeild abnormal results are repeated for confirmation. What is the probability that for a normal person a test will be at least 1.5 times as high as the upper limit of normal on two seperate occasions.
A movie theater owner wanted to know how many people hated commercial at the beginning of movies if less then 10% hated the commercials the he would leave them.
Interview the officers of every fraternity at each of these 30 institutions. Is this a simple random sample, cluster random sample, or stratified random sample?
Scientist does n ot believe that water ph is 7. She wants to test the null hypothesis that the true level of ph is 7 at the .05 significance level. Her alternative hypothesis is that the water does not have a ph of 7. Which p-value will she reject..
The dean of a nursing school claims that the average starting salary of its graduates is more than 60 (in $000's). It is known that the population standard deviation is 10 (in $000's).
The first three horses in the ninth race. If there are 12 horses entered in today's ninth race, how many Big Triple outcomes are possible?
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