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Passing stats. Molly s college offers two sections of Statistics 101. From what she has heard about the two professors listed, Molly estimates that her chances of passing the course are 0.80 if she gets Professor Scedastic and 0.60 if she gets Professor Kurtosis. The registrar uses a lottery to randomly assign the 120 enrolled students based on the number of available seats in each class. There are 70 seats in Professor Scedastic s class and 50 in Professor Kurtosis s class.
a) What's the probability that Molly will pass Statistics?
b) At the end of the semester, we find out that Molly failed. What's the probability that she got Professor Kurtosis?
Variance hour 100 and battery y: sample size 12,mean hour 1020,variance hour 121. can you conclude that two types of batteries are having the same mean life?
Calculate the test statistics
Suppose a student received the following grades for the semester: History, B; Statistics, A; Spanish, C; and English, C. History and English are 5 credit hour courses
Professor Smith's statistics midterm had a mean of 85 and a standard deviation of 8. If a student got a score of 73, what was the student's standardized (z) score? What is the probability of a normal random variable taking a value more than 1.6 sta..
Where you are calculating the value of uncertain outcomes (probability nodes on the diagram), do this by multiplying the value of the outcomes by their probability. The total for that node of the tree is the total of these values.
a. Each of a sample of 240 tomatoes grown with a new type of fertilizer was weighed (in ounces) and recorded. Draw a histogram and describe your findings.
A paint manufacturer claims its paint will last an average of 16 years. Assume that paint life is normally distributed with a standard deviation of 3.2 years. Suppose a random sample of 20 houses are painted with this manufacturer's paint. What is..
The equation for predicting calories from these explanatory variables is
Do you try to pad your insurance claim to cover your deductible? About 40% of all U.S. adults will try to pad their insurance claims. Suppose that you are the director of an insurance adjustment office.
Consider the time series modelyt = 200 + 0.7yt-l + e. Consider the time series model
information from the department of motor vehicles indicates that the average age of licensed drivers is micro 45.7
Following are the numbers of daily bids received by the government of a developing country from firms interested in winning a contract for the construction.
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