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Two six-sided (balanced) dice are thrown. Find the probabilities of each of the following events:
(a) a= 5 does not occur on either throw;
(b) the sum is 7;
(c) a 5 and a 3 occur in any order;
(d) the first throw is a 5 and the second throw is a 5 or a 4;
(e) both throws are 5;
(f) either throw is a 6.
Do a two-sample test for equality of means assuming equal variances. Calculate the p-value. Comparison of GPA for randomly chosen college juniors and seniors: ¯ x1 = 3.05, s1 = .20, n1 = 15, ¯ x2 = 3.25, s2 = .30, n2 = 15, α = .025, left-tailed t..
Find the area of the indicated region under the standard normal curve.
Ran parts and found 1% defective(1 out of 100). Made a change to the process and want to rerun parts. How many parts do we need to check (and find 0% defective) for a 90% confidence factor
Traffic forecasters at the Minnesota Department of Transportation (MDOT) use regression analysis to estimate weekday peak-hour traffic volumes on existing and proposed roadways. In particular, they model y, the peak-hour volume (typically, the vol..
The mean amount of time a (unnamed) computer server is down is 18.3 minutes with a standard deviation of 5.7 minutes.
Estimate the number of moose on Isle Royale from these data, and then verify your guess by computer program.
Deseasonalize the time series. Compute the linear trend equation for the deseasonalize data and forecast sales for the first quarter of year 4. Be sure to reseasonalize your forecast
Let Y denote the number of students on his bus. Compute the expectations and variances of X and Y:
recall that a bank manager has developed a new system to reduce the time customers spend waiting to be served by
licence plates in florida have the form a12bcd. that is a letter followed by two digits followed by three more
you are employed by a firm that has a contract to examine educational scores from school districts throughout the
Assume 1.5% of antennas on new Nokia cell phones are imperfect. For random sample of 200 antennas, determine the probability that: None of the antennas is defective.
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