_______P(0 lessthanorequalto Z lessthanorequalto 1) = 1/2 P(-1 lessthanorequalto

Question

_______P(0 lessthanorequalto Z lessthanorequalto 1) = 1/2 P(-1 lessthanorequalto Z lessthanorequalto 1). _______We expect the observed value of x to be within three standard deviations of the expected value about 99.7% of the time for any probability distribution. _____ For a continuous distribution, P(X=x_i) = 0 _____The covariance of two non-independent random variables are always fall in (-1, 1) _______If the correlation between two random variables equal to 0, then these two variable are independent

Explanation / Answer

1. T

2. T. Since IN EXCEL "=NORM.S.INV(1-(1-0.997)/2)= 2.97"

3. T. Since at any given instance area=0 so probability =0

4. F. Since it's correlation that has to be within -1 & 1 not covariance

5. F. Not necessarily. But other way round is true

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