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1. Let X and Y be independent chi-square random variables with 14 and 5 degrees of freedom, respectively. Find
(a) P (|X - Y | ≤ 11.15),
(b) P (|X - Y | ≥ 3.8).
2. A particular type of vacuum-packed coffee packet contains an average of 16 ounces. It has been observed that the number of ounces of coffee in these packets is normally distributed with σ = 1.41 ounce. A random sample of 15 of these coffee packets is selected, and the observations are used to calculate s. Find the numbers a and b such that P (a ≤ S2 ≤ b) = 0.90.
motorola obtains cell phones from its contract manufacturer located in china to serve u.s. market. the u.s. is served
If appropriate, determine which methods differ in mean yields. At the 0.05 level of significance, is there evidence of a difference in the variation in yields among the different methods?
we must be able to assign a probability distribution or probability function to the random variable X. So, what is the distribution of X when X ~ bin(n, p)?
If the mean IQ of all Omega University students was equal to 115, and a small random sample of students was selected from the population whose mean IQ was 120, then this difference of 5 points would equal the:
Assuming that the manager's claim is correct, calculate the probability that 117 or fewer of 205 randomly selected marketing researchers would disapprove of the scenario.
Write a brief summary report on the demographic and class distribution of this sample. Paste the tables and charts into your report and label each of them properly.
Whats the most appropriate procedure for evaluating the relationship between tenure and divorce and what is the correlation and how can it be interpreted in terms of magnitude, direction and practical importance?
We suspect that automobile insurance premiums (in dollars) may be steadily decreasing with the driver's driving experience (in years), so we choose a random sample of drivers who have similar automobile insurance coverage and collect data about th..
You are in charge of a new study on the effect of caffeine and memory. From , a previous pilot study , you find that the effect size is 0.6. You want to have a type I error at 0.05 and a type II error of 0.2 . In your study you split your sample i..
heights of men on a baseball team have a bell-shaped distribution with a mean of 169 cm and a standard deviation of 5
if Susan constructs a small station and the market is good, she will realize a profit of $50,000.What is the maximax decision? What is the Hurwicz (criterion of realism) decision with α = 0.8?
new car design specifications are being considered to control the variation of the head injury measurements. use the
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