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It has been a bad day for the market, with 70% of securities losing values. you are evaluating a portfolio of 10 securties and will assume binomial distribution for the number of securities losing their value. Find the mean and standard deviation of this distribution?
Carry out a two-sample t test to compare the population means. What assumptions are required for this to be a valid test? At the α = 0.05 signi?cance level, what does this result imply about the null hypothesis?
a. Formulate the null and alternative hypotheses. b. Which statistical test would you use? Why?
The range (distance from transmitter) of a radar target is determined from the delay between the transmitted and return signals.
the number of people arriving for treatment at an emergency room can be modeled by a poisson process with a rate
A wholesaler assures retailer replacement times for TVs normally dist. with mean of 8.2 and s.d. of 1.1. The retailer finds that a random sample of 20 sets from the wholesaler have mean replacement time of 7.6 years.
find the weighted mean for three exams if the first one was worth 20 and the student received a 80 the second was
electrical engineers recognize that high neutral current in computer power system is a potential problem. a recent
If W denotes the total number of spaces one moves under these special conditions, find the mean and standard deviation of W.
let xy be jointly distributed random variables with joint density fxy19 for 0ltxlt3 and 0ltyltx2determine fxx given
statistics from a random sample of 13 men and 19 womens college grade point averages showed the mens average was 2.898
explain whether an experiment or an observational study would be more appropriate to investigate whether acupuncture
Let's assume that I, your instructor, have tired of teaching and I go into another career as an inventor. I have invented a machine to teach young kids how to shot basketball free throws. I am just about to receive my patent on my machine, but nee..
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