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Suppose that IQs of East State University s students can be described by a Normal model with mean 130 and standard deviation 8 points. Also suppose that IQs of students from West State University can be described by a Normal model with mean 120 and standard deviation 10.
a) We select a student at random from East State. Find the probability that this student s IQ is at least 125 points.
b) We select a student at random from each school. Find the probability that the East State student s IQ is at least 5 points higher than the West State student s IQ.
c) We select 3 West State students at random. Find the probability that this group's average IQ is at least 125 points.
d) We also select 3 East State students at random. What's the probability that their average IQ is at least 5 points higher than the average for the 3 West Staters?
Your paper should in 500- 600 words 1) summarize the statistical methods that the researchers used in their article and 2) evaluate those statistical methods. Were the techniques they picked (correlation, hypothesis testing, regression, for exampl..
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acceptance samplinga teletronix company purchases large shipments of fluorscent bulbs. they randomly select and test 24
a) Create a matrix with 50 rows and 5 columns such that each row is a sample of size 5 from the exponential distribution with ß=1. Print your matrix.
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What is the probability of drawing one or more aces after discarding 5, 7, 8, and 9
(i) Write down all possible choices of two of the five names. This is the sample space. (ii) The random drawing makes all choices equally likely. What is the probability of each choice? (iii) What is the probability that Mei-Ling is chosen?
If seven workers are selected at random, what is the probability that a majority of them are made sick by their workplace?
At the .01 significance level, is there a relationship between job pressure and age?
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