6.68% of the students scored at least 19 points on this test while the 85 percentile has a test score of 24.08 points
The z score is used to determine by how many standard deviations the raw score is above or below the mean. The z score is given by:

P(x > 19) = P(z > 1.5) = 1 - P(z < 1.5) = 1 - 0.9332 = 0.0668
6.68% of the students scored at least 19 points on this test
b) 85 percentile corresponds to a z score of 1.04

The 85 percentile has a test score of 24.08
Find out more at: brainly.com/question/25012216
Answer: (3,inf)
(-inf,3)
Step-by-step explanation:
Hey the answer is 2713 cm
I'm sorry!!!!
where is the x?!
Why not look up "standard deviation" yourself, to be sure? But yes, the std. dev. is the sqrt of the variance.