From the data given below find the number of items (n): r=0.5 , Σ xy- 120 , σy = 8 , ΣΧ 90 Where x and y are deviations from arithmetic mean.

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A: Here is joint probability distribution is given, we will find mean of marginal distribution of y.

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Q: Define contingency table

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Q: Example 1 The mean height of 45 students ofa class is 60" and the mean height of 55 studen of anothe...

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Q: If W is the Gaussian (82, 7.2) random variable, calculate the following: P(W60) c. P(W<87)

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Q: B. Using the Z-TABLE, find the area of the following: (2 point each number) 1. z =0 to z = 2.23 2. z...

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Q: A person drives for 200 kilometres at a speed of 30 k.p.h. He drives another 200 kilometres at a spe...

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A: Given,n=10p=0.2q=1-0.2=0.8A random variable X~Binomial (n=10 , p=0.2)

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Q: Show using MGF technique that if Z, - N(0,1), for i = 1,2,3,4,5 , then U = Ez - x² with 5 degrees of...

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Q: Define codebook

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Q: Under imperfect multicollinearity A. the OLS estimator will be biased. B. the OLS estimator will hav...

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Q: Example 6-12. Let X be a r.v. with ean µ and variance o2. Show that E (X– bR, as a function of b, is...

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Q: Example 5-2. If, p(x) = { 15ix = 1, 2, 3, 4, 5 (0, elsewhere Find (i) P {X = 1 or 2), and (ii) P{1}.

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Q: level of significance (i.e., type I error rate) 0.1 such that each tail of the rejection region has ...

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Q: f(x)= 3(x+5)^2-1; (-4,2)  what's the axis of symmetry

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Q: Find the first quartile (Q1) and the third quartile (Q3), given the scores of 9 players in an online...

A: Arrange the given data in ascending order1, 3, 7, 7,  16, 21, 27, 30, 31sample size(n)=9