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Suppose the time spent by a randomly selected student who uses a terminal connected to a local time-sharing mini-frame computer facility has a gamma distribution with mean = 20 minutes and variance = 80 minutes.
a. What are the values of alpha and betab. What is the probability that a student uses the trminal for at most 24 minutes?c. What is the probability that a student spends between 20 and 40 minutes using the terminal.
Describe a hypothesis you have related to the area of psychology in which you are predicting a correlation. What is the specific nature (direction) of the correlation and why do you think it would occur?
Determine the value of the finite population correction factor if population size is 1000 and the sample size is 300? What is the smallest sample size for which finite population correction factor must be Used?
Paired samples t-test for the given data - financial advice from the voluntary organization - A local voluntary organization affiliated to the Citizens Advice Bureau offers free financial advice to residents in the area who are registered debtors
You are thinking of employing a t-procedure to test hypotheses about the mean of a population using a significance level of 0.05.
Determine the mean and standard deviation for number of actual voters in groups of 1002.
The sample mean talk time was 315 minutes with a standard deviation of 24 minutes. Why can we say that the sampling distribution of x is approximately normal?
They tested a random sample of 40 batteries using a special device designed to imitate real-world use and recorded data on battery lifetime. Determine the sample mean (in minutes).
In the week before and the week after a holiday, there were 10,000 total deaths, and 4972 of them occurred in the week before the holiday.
Assume a sample of 400 American adults were taken. Show the sampling distribution of the proportion of adults who balance their checkbook at least once a month.
Student received the following grades last semester. Find the student's semester grade point average. Course Credits Grade/Points Statistics 4 A / 4.0.
Plot the data, fit a trend line, and discuss the strength of prediction of the regression model.
Test the whether the attitude toward keeping weight down associated with smoking status.
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