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Statistics? I thought it was .92 because .8212 is closest on the table but thats wrong?
2 Answers
- AlanLv 71 year agoFavorite Answer
z table normally gives a left -tail
P(z< Z) = left-tail
P(z>Z) = 1- P(z<Z) is the right tailed
so you need to look up
P(z<Z) = 1-0.8225 = 0.1775
https://www.math.arizona.edu/~rsims/ma464/standard...
P(z< -0.93) = 0.17619 (so 0.1775 is 0.131 away from this)
P(z< -0.92 ) = 0.17879 (so 0.1775 is 0.129 away from this)
so the answer should z = -0.92 ( not + 0.92)
but is really closer to -0.925
- ?Lv 71 year ago
Since 0.8225 is more than 0.5 and applies to the right-area, the z value applies to a value *below* the mean and you might be expected to enter a negative value, i.e. -0.92