5 of 10 ID: C Name 18. In a simple lincar regression analysis, the following res

Question

5 of 10 ID: C Name 18. In a simple lincar regression analysis, the following results are found 2 Slope of the cstimated regression linc b-6 Estimated standard devistion of by-su-2 Based on these information, what is the calculated t value? enough information given to answer this question None of the above 19. A chi-square (z") test is used to test the following hypothescs about a population variance Arandom sample of 16 (n-16) is taken and he significance level () is equal toads. The calculated chi-square (z') value is determined to be 10. Based on these information, what is the critical chi-square (z) value and what is the conclusion? 27.587 and accept He 24.996 and accept h Not enough infonnation given to answer this question B 26.296 and accept He E None of the above 20. In a simple lincar regression analysis, the following results are found Slope of the estimated regression line- by-minus 4 Coefficient of determination -0.64 Based on these information, what is the sample correlation coefficient (r) A Plus 0.80 inus 0 C Minus Not enough information given to answer this question None of the above

Explanation / Answer

19.
Critical value of chi-square = =CHISQ.INV.RT(0.05,15) = 24.9956

As test statistics less than critical value, accept H0

Option (C)

20.
r = sqrt(r^2) = sqrt(0.64) = 0.8
As the slope is negative, the correlation exists is negative.

Hence r = -0.8
Option B

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