Scores of each of the previous calculus tests were normally distributed with a mean of 74 and standard deviation of 3.8. Steve will be taking the test tomorrow. What is the P(z<-1.05)?

-2.2 (-2.2124%)  is the answer as -2.2124^2 = -4.89% is found first below. -2.2124 is part of the derivation equation to find the relation with z.

z<-1.05 therefore = -2.2<-1.05

Step-by-step explanation:

-4.89%

-0.27631578947 x 74= -20.4473684208

P)z<-105) =  100/-20.4473684208 = -4.89060489067 less than the population of 100%

0 =population standard deviation = 3.8 we divide from 1.05

(in normal derivation questions we can multiply before dividing 0 key letter =(z- u)^2 / divide all by N) This is why we divided.

N=the size of the population = 100/D we used 100/D to find the first part.

z=each value from the population  = z<-1.05

u=the population mean = 74 we multiplied second step after first step 3.8 we divide from 1.05

So that 1.05/3.8 = -0.27631578947 x 74 = D

We then Divide into N = 100/D

to find a whole or a percentage.

= -4.89

z = -2.2

describing distributions is one of the key skills you’ll need to earn a high score on the ap statistics exam. if you need proof of this, just flip through some past exam questions, which can be found at the collegeboard website. you’ll notice that the first free response question is almost always a question requiring you to look at a graph and describe it.

step-by-step explanation: just trying to get points sorry : (

triangle and cube

step-by-step explanation: