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A box of cookies contains 3 chocolate and 7 butter cookies. Miguel randomly selects a cookie and eats it. Then he randomly selects another cookie and eats it. (How many cookies did he take?)
-Draw the tree that represents the possibilities for the cookie selections. Write the probabilities along each branch of the tree.
-Are the probabilities for the flavor of the SECOND cookie that Miguel selects independent of his first selection? Explain.
-For each complete path through the tree, write the event it represents and find the probabilities.
-Let S be the event that both cookies selected were the same flavor. Find P(S).
-Let T be the event that the cookies selected were different flavors. Find P(T) by two different methods: by using the complement rule and by using the branches of the tree. Your answers should be the same with both methods. Let U be the event that the second cookie selected is a butter cookie. Find P(U).
Compute the mean number of accidents per day and then explain its meaning.
Calculate the 95% confidence lower bound of the population mean. It is found in a sample of 109 items that 7 of them don't work
Is there any evidence of a difference in variability of times for men and women who finished this vertical run? Use a = 0.05 and assume normality.
As the study is described, what are the independent and dependent variables? For nominal variables, state the levels.
It's known that 30% of the population left the hotel 1 star, 20% left 2 stars, 20% left 3 stars, and 30% left 4 stars. Give the hotel's average star rating.
Pollsters attempt to find out whether or not person is a "likely voter" before they count their opinion in poll. If we suppose 40% of registered voters will really vote.
How would I go about finding a 95% confidence interval for the population mean if a sample of size 20 has a mean of 18.2 and a sample standard deviation of 3.6?
Estimate the difference between the methods. Give a confidence interval for the mean difference. What assumptions have you made?
Slot machine. A slot machine has three wheels that spin independently. Each has 10 equally likely symbols: 4 bars, 3 lemons, 2 cherries, and a bell.
Louis Reasoner is having a terrible time doing exercise 2.42. His queens procedure seems to work, but it runs extremely slowly. (Louis never does manage to wait long enough for it to solve even the 6× 6 case.) When Louis asks Eva Lu Ator for help,..
the random variable x has a poisson distribution with mean 40. give an approximate value of the probability p 37 less
find the probability density function for the t-distribution with 1 degree of freedom. hint in math 380 you calculated
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