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A high school counselor is interested in the percentage of students who will be going to college. She randomly picks 60 students and finds that 53 will be going to college. Use a 95% confidence level to find the population proportion.
Make a List of type of possible errors. Assume that you were interested in knowing the mean score for a certain quiz in a statistics class.
Find a 99% confidence interval estimate of the proportion of people who say that they voted.
What if the number of debilitating network viruses detected in a day at the firewalls of an Internet service provider within a certain geographic region is fueling a possible management decision to upgrade the detection system.
A car rental office checks out an average of 30 cars per day with a standard deviation of 8 cars. If a sample of 25 days of operation is selected and the sample mean is computed.
What is the probability that the sum of their scores exceeds 1200 and probability that the average of the scores of all 400 student
The rest have no opinion. " Suppose that a a sample of 100 American adults is quizzed on the subject. What is the probability of the following events?
A teacher wants to know if students in her biology class did significantly better on an exam after instruction using authentic learning. The scores pre and post test are listed below. Based on an α = .05, what can the teacher conclude?
Define probability and explain its three perspectives. Provide an example of each. Explain the concept of mutually exclusive events. How do you compute the probability P(A or B) when A and B are, and are not, mutually exclusive.
Nationwide, the average time until a electric utility customer service representative answers a call is 260 second. The Gigantic Kilowatt Energy Company rnadomly sampled 30 calls and found that, on average, they were answered in 227 second with a ..
The Bunte Auto Repair Shop received a shipment of four carburetors. One is known to be defective. If two are selected at random and tested.
A sample of 84 golfers showed that their average score on a particular golf course was 89.05 with a standard deviation of 3.47.
Suppose the time necessary to process an application for a license plate for a newly purchased vehicle is normally distributed with mean of 6 minutes and standard deviation of 1.5 minutes.
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