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To find the probability that will reject the claim (x <1160 hours)
An appliance manufacturer claims that the mean life of its product is 1200 hours. Assume that the standard deviation is 120 hours. A consumer agency decides to randomly select 35 items and will reject the claim if x <1160 hours. If the manufacturer's claim is true, what is the probability that the claim will be rejected?
Construct a 95% confidence interval estimate of their mean weight.
Determine a 99% confidence interval for mean pH in rainfall. How would you distinguish interval?
Perform hypothesis testing on one variable's data.
For a t distribution with 16 degrees of freedom, find the area, or probability, in each region.
During the 2003 season, MLB took steps to speed up the play of baseball games in order to maintain fan interest; the following results come from a sample of 60 games played during the summer of 2002. And a sample of 50 games played during the summ..
Illustrate what can we say about the probability distribution. Is it approximately normal, elucidate the mean and standard deviation.
Categorize the following as discrete or continuous random variables.
Average performance evaluation is higher for managers hired from outside firm compared with those promoted from within? What other stories does this graph tell?
Set up a hypothesis test. Is Charmers' truthful? Describe by working through hypothesis test.
What is the probability that they all hit the target?
Decision rule which chooses alternative associated with smallest maximum opportunity loss is?
When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be:
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