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A student who lives far away from the university has to travel to the university by bus on weekdays. He recorded his trips 5 times during the last month. The time (in minutes) was 38, 33, 36, 47, and 41. What is the variance for this sample data___
On Saturdays, cars arrive at a car wash at the rate of 6 cars per hour. Using the Poisson distribution, the probability that five or six cars will arrive during the next hour is ____
In 2002, Colorado experienced a drought and many towns on the front range issued either mandatory or voluntary water restrictions on outdoor watering. The data file drought .txt contains data from five front range towns on their June 2001 and June..
The rate for renting a motor scooter for one day at a beach resort area is $25 plus 30 cents for each mile the scooter is driven.
If they selected new random samples of 100 males and 100 females, would the average salaries of those samples be $51,000 and $49,500? Explain.
Construct a control chart for the proportion of dissatisfied customers. Revise the control limits, assuming special causes for points outside the control limits.
Do you think that changing the population would change the kind of conclusion that we could draw? Explain your answer.
A shopping centre wants to examine the amount of space required for parking. Studies indicated that 50% of staff and shoppers use public transportation.
(a) Determine the probability that it will be cloudy on the next day, Thursday. (b) Determine the probability that it will be cloudy on Friday.
A system consists of two branches in parallel, each branch having two components. The probabilities of successful operation of components A, B, C, and D
What is the critical value for a two-tailed F-Test with a=0.10, when the sample size from which the variance for the numerator was obtained was 10,
The errors of 17 students follow. Analyze the errors with a Mann-Whitney U test and write a conclusion about the effects of noise on reading.
a researcher thinks that people who drive red cars drive faster than people who drive silver cars. he recorded the
Calculate the correlation coefficient, coefficient of determination. Check whether there is a relation between correlation coefficient and coefficient of determination.
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