[fr3e p0ints]

D. M me on i. g, i h8 class lol

at/cloutedmatt

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

Explain why the factor 1.5 is broke. into two numbers in the model.