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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.
if we are testing for the difference between the means of 2 related populations with samples of n1 30 and n2 30 the
The consultant is given a sample of 225 batteries to test. A. Calculate the standard error of the mean.
What is the probability of selecting a sample of n=9 scores with a mean less than M=34? What is the probability of selecting a sample of n=36 scores with a mean less than M=34?
The first salesperson to find a strong leader will win the account. Do the three salespeople have the same chance of winning the account? If not, find their respective probabilities of winning.
Type the above data into the SPSS Data Editor window, or save this file as an unformatted text file and write SPSS syntax to read it in.
64% of the workers at Motor Works are female, while 66% of the workers at City Bank are female. If one of there companies is selected at random (assume a 50-50 chance for each), and then a worker is selected at random, what is the probability that..
I have fit a line to data representing cholesterol readings for 28 individuals starting a cholesterol reducing drug. The computer provides the following output, The degrees of freedom for the t test for the slope are
The the steps of hypothesis testing b) sketch the distribution involved, and c) explain your answer to someone who is familiar with the t test for a single sample but not with the t sest for independent means.
a counter-flow heat exchanger receives 1.2 kgs of 2.0 bar saturated vapor steam that exits at the same pressure. the
A social scientist believes that university theology professors are more conservative in political orientation than their colleagues in psychology
as part of a public health survey a random sample of college students were asked about their weekly drinking habits.
You have to take this data and complete a regression analysis. Your assignment is to select a data set, complete the descriptive statistics and do a full regression analysis and write up conclusions and observations.
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