Omitting an important variable а. biases b only if it is not related to the 'School' variable. b. does not affect the estimate of b. It only affects the standard error of the estimated coefficient. С. biases b and affects the standard error of the estimated coefficient. d. biases b only if it is related to the 'School' variable.

Q: Determine the variance of Z.

A: Helpful formulas (i)VaX=a2VX(ii)VC=0,where c is the constant(iii)VaX+ bY=a2VX+ b2VY

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A: Statement (3) is correct. The dtaat shows a negative correlation.

Q: The variance of the data :. 6 ,6 ,-6,-6 is equal to

A: Find variance of the data  6 ,6 ,-6,-6

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A:

Q: 3. Explain the methods used to measure the association between variables.

A: The methods used for measuring the association between variables must be determined.

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A: Answer

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Q: The variance is sometimes a negative number.

A:

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A: Solution:  Given information: μ= 1000  Population mean σ2= 1200  Population varaince tax = 10%

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A: Solution:

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Q: * 2.4.5.6-8-17 11 17 20 24 32 Xị 3 5 9 3 fi 1. 4) 5n 00

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A:

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