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Suppose a company claim their weekly losses are no more than $2500. A sample of 40 random weeks finds a weekly loss mean of $3200 with a standard deviation of $750. Test their claim at the a=0.05 level.
Determine mean and standard deviation for number of erroneous returns per batch.
A sample of size 9 is drawn at random from a Normal distribution. The experiment has a null hypothesis of μ = 0 and an alternate hypothesis of μ > 0. The mean of the sample is 7 with an s of 8. Is there a difference at the 1% level?
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?
List the 15 possible samples (without replacement) of two artists that can be selected from the six. for brevity, use the initial provided.
They also know that the distribution of loss from fire has a skewed distribution; many have $0.00 losses and a few have large losses.
Which of these variables are discrete and which are continuous random variables?
State a question that can be answered in a "binomial" manner, such as Do you normally read the front page of a newspaper at least 4 times a week?
A product is made up of two subsystems in parallel. Subsystem one consists of ten elements in series each with a failure rate of 1/100. The second subsystem consists of 5 elements in series each with a failure rate of 1/200. What is the overall re..
Calculate a 95% upper confidence bound on the mean. Compare this bound with the upper bound of the two-sided confidence interval and discuss why they are different.
What are the pros and cons of selecting an established theoretical or conceptual model or framework? What are the pros and cons of creating/developing your own?
The waiting time to place an order at a branch of a fast-food chain during the lunch hour has had population mean of 3.55 minutes, with a population standard deviation of 1.1 minute.
Then test to see whether it considerably varies from 0 [use alpha = 5%]. Don't forget to identify the null and alternative hypotheses.
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