8. (7 pts) The following data give y, the number of months it took a sample of 8 school leavers to find employment and x

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8. (7 pts) The following data give y, the number of months it took a sample of 8 school leavers to find employment and x

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8 7 Pts The Following Data Give Y The Number Of Months It Took A Sample Of 8 School Leavers To Find Employment And X 1
8 7 Pts The Following Data Give Y The Number Of Months It Took A Sample Of 8 School Leavers To Find Employment And X 1 (53.4 KiB) Viewed 34 times
8. (7 pts) The following data give y, the number of months it took a sample of 8 school leavers to find employment and x, the number of GCSE exam passes they each had. Calculate the product-moment correlation coefficient and comment. 9. (8 pts) Suppose that X is a random variable having the Poisson distribution with mean λ such that P(X=2)=P(X=4). (a) Find λ. (b) Find P(X≥2). 10. (7 pts) Suppose that X is a random variable. It is known that X∼B(n,p). Show that E(X)=np.
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