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An experiment consists of rolling a special 22-sided die. All of the numbers, 1 through 22, are equally likely. Find the probability of each event.
a. A = rolling a number greater than 10 and even.
b. B = rolling a prime number or a number divisible by 5.
c. C = rolling at most an 11.
d. D = rolling a number divisible by 2 and 3.
In a random sample of 22people, the mean commute time to work was 33.1minutes and the standard deviation was 7.3minutes. Assume the population is normally distributed and use a t-distribution to construct a 99%confidence interval for the populatio..
Compute the value of t. What is your decision regarding the null hypothesis? Briefly summarize your results.
Kyle averages 7 finished accounts a day. His standard deviation is 2 account per day and we wish the probability that Kyle will finish day with more than 8 finished accounts. Probability will be?
an abrupt transition occurs at a reynolds number of about 3x105 where the drag on a sphere moving through a fluid
suppose that a point x y is to be chosen at random in the xy-plane where x and y are independent random variables and
Rolling a die Simulate 36 rolls of a fair die. Give the relative frequency and the corresponding theoretical probability of each of the outcomes and compare them.
Fit the model E(y) = β0 + β1x to the data.- Calculate the residuals for the model. - Plot the residuals versus x. Do you detect any trends? If so, what does the pattern suggest about the model?
Assume that this sample mean was obtained from a random sample of 200 homes in this county, and that the sample standard deviation was $140,000. Give a 95% confidence interval for the average value of a home in Ventura County.
a survey is to be made of the prevalence of the common disease in a large population. for any disease that affects
A large retail corporation plans to sample sales receipts of its meat department to estimate the average size (in dollars) of a customer purchase. Previous analysis suggest that the standard deviation of the purchase amount is approximately $50.72..
Run a regression of sales against local income (only). Based on this regression, give an interval that you are 95% confident will contain your sales in a neighborhood with total income $200M. Do you think this regression is useful for planning you..
Construct a 95% confidence interval for the population mean number of shares traded per day in 2010. Interpret the confidence interval.
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