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Question: Suppose we have ten independent trials with three outcomes called good, bad, and indifferent, with probabilities p, q, and r, respectively. What is the probability of three goods, two bads, and five indifferents? In n independent trials with three outcomes A, B, and C, with probabilities p, q, and r, what is the probability of i As, j Bs, and k Cs? (In this problem we assume p + q + r = 1 and i + j + k = n.)
Calculate the probability that fewer than half of the patients are chain smokers. b) suppose that 20 patients with lung cancer are admitted to the hospital.
Suppose that 10 years ago the average annual expense for stock funds was 1.19 percent. Let µ be the current mean annual expense for all stock funds, and assume that stock fund annual expenses are approximately normally distributed.
A machine produces 3 inch nails. A sample of 100 nails is selected, and it is found that 25 are shorter than 3 inches. Find the 95% confidence interval on the proportion of all such nails that are shorter than 3 inches.
the number of robberies in each precinct in 2009 is what level of measurement?1. none2. nominal3. ratio4.
a manufacturer of microwave ovens is trying to determine the length of warranty period it should attach to its
According to Chebyshev's Theorem, how many students scored between 24 and 78? Assume that the distribution is normal. Based on the Empirical Rule, how many students scored between 24 and 78?
Also, if the standard deviation of all pumps σ is unknown, is there an easier formula to estimate the sample size to control the width of the confidence interval? Please explain it.
consider the following. give your answers correct to two decimal places.a find the standard score z such that the area
Use " either the area around Normal Distribution Calculator or Z-tabl. (round to nearest thousandth)
What amount of money must be invested now so as to accumulate to R10 525 in 30 months' time at:
suppose we have a floor made of parallel strips of wood each with width 3 and we drop a needle of length 1 onto the
Is there evidence of a difference in the variability of the waiting time between the two branches? (Use 5% level of significance). Find the p-value in (a) and interpret its meaning.
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