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Q1) Production Company creates DVD's by thousands. Though, sometimes there are minor defects in DVD's which make them "faulty" by industry standards. For one company, they evaluate that 3% of their DVD's are defective, and should be exchanged/returned for refund by customer. Best Buy buys DVD's from this company, which is where you usually shop. Assume you buy 20 DVD's.
a) Determine the probability that exactly one of the CD's is defective?
b) Find out the probability that at least one of the CD's is defective?
c) Determine probability all of the CD's are in good condition (not defective)?
Q2) A particular population is evaluated to be made up of 26% college graduates (regardless of degree). If we arbitrarily choose 100 people from this population, determine the probability that our sample contains at least 30 college graduates?
Given the following data on hotel check-ins for a 6-month period:
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p- value.
Create the corresponding decision tree and make recommendations.
Subjects at both sites were classified as dropouts if they left the study before the conclusion, or completers if they finished the study
Create a 95% confidence interval for population proportion of positive drug tests.
These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below for the statement "The instructor is an excellent teacher.
Let Y be the number of envelopes for which the machine fails to remove a check. Using the Central Limit Theorem to approximate P{Y≤10}.
What is the probability that more than one machine is in the system? Probability that more than two are broken and waiting to be repaired or being serviced? More than three? More than four?
Data in table represent number of consumer complaints against major U.S. airlines. If one complaint from table is arbitrarily chosen, determine the probability that it was filed against United Airlines.
The following table shows the number of miles driven in each trial.
The Central Limit Theorem states that the sampling distribution of means is:
Some researchers have conjectured that stem-pitting disease in peach tree seedlings might be controlled with weed and soil treatment. An experiment was conducted to compare peach tree seedling growth with soil and weeds treated with one of two her..
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