a)P(Z < 1.04) is __________         b)P(Z > 0.78) is ___________         c)P(1.15 < Z < 1.72) is ___________

What is the value of Σ(X2 + 2) for the following scores? Scores: 9, 10, 8, 6, 5, 9, 6, 5 a. 450 b. 464 c. 624 d. 712

Pls help ASAP. Pls show all work. Pls do both of the asked questions pls i BEG.

Which of the following statements is correct ? If a coefficient is significant at the 10% level, it must be significant at the 5% level. If a coefficient is not significant at the 10% level, it may be significant at the 5% level. If a coefficient is not significant at the 5% level, it must not be significant at the 10% level. O If a coefficient is not significant at 1% level, it may be significant at the 5% level.