Use the normal distribution of sat critical reading scores for which the mean is 504 and the standard deviation is 112. assume the variable x is normally distributed.
left parenthesis a right parenthesis
(a) what percent of the sat verbal scores are less than 675?
(b) if 1000 sat verbal scores are randomly selected, about how many would you expect to be greater than 525?
approximately
% of the sat verbal scores are less than 675.
(round to two decimal places as needed.)

a. Transform , the random variable representing SAT scores, to , the same random variable but following the standard normal distribution, via

so that about 93.77% of scores fall below 675.

b. Use the same strategy to compute :

Then out of 1000 scores, you would expect about 574 of them to exceed 525.

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.