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To assess opinion of students at Ohio State University about campus safety, reporter for student newspaper interviews 15 students she meets walking on campus late at night who are eager to give their opinion.
The sample obtained is
a. probably biased.
b. a simple random sample of students feeling safe.
c. a stratified random sample of students feeling safe.
d. a probability sample of students with night classes.
Events A and B are mutually exclusive events defined on common sample space. If P (A) 0.5 and P (A or B) = 0.70, determine P (B).
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..
A manager of a small store wanted to discourage shoplifters by putting signs around the store saying "Shoplifting is a crime!" However, he wanted to make sure this would not result in customers buying less.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
Wheel-Rite has agreed to ship the maximum number of wheel bearings that it produces each day to Itex when an order has been received.
Pollsters try to determine whether or not a person is a "likely voter" before they count their opinion in a poll. If we assume 40% of the registered voters will actually vote, in a random sample of 100 registered voters we can be 95% confident tha..
A statistics professor planed her classes so carefully that the lengths of her classes are uniformly distributed between 45 and 55 minutes. Find the probability that a given class period runs greater than 50.25 minutes.
Discuss the limitation of the expected value approach to assessing the risks of taking on the franchise. What other factors should be considered by Ariba Ltd?
What additional strategies (up to 3) you would propose that may increase validity of the findings.
Use the method of least squares to model the relationship between x and y.
Randomly selected cans of Coke are measured for the amount of cola in ounces. The sample values listed below have a mean of 12.19 ounces and a standard deviation of 0.11 ounces. Use a 0.05 significance level to test the claim that cans of coke hav..
When planning the new baseball stadium for Washington DC, you are asked to find the break-even point for the number of luxury skyboxes built.
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