SOLUTION: Use the normal distribution of SAT critical reading scores for which the mean is 509 and the standard deviation is 118. Assume the variable x is normally distributed. (a) What p

Question 1176408: Use the normal distribution of SAT critical reading scores for which the mean is 509 and the standard deviation is 118. Assume the variable x is normally distributed.
(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 550?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z <(x-mean)/.sd
or < (675-509)/118
or < 1.407
that probability is 0.9203
92.0%
-
z>(550-509)/118 or >41/118 or >0.347
that probability is 0.3641
or 364 of the 1000.
RELATED QUESTIONS
Use the normal distribution of SAT critical reading scores for which the mean is 512 and... (answered by rothauserc)

Use the normal distribution of SAT critical reading scores for which the mean is 501 and... (answered by Boreal)

Use the normal distribution of SAT critical reading scores for which the mean is 515 and... (answered by Boreal)

5.2.17 Use the normal distribution of SAT critical reading scores for which the mean (answered by Boreal)

There are two major tests of readiness for college, the ACT and the SAT. ACT scores... (answered by Boreal)

Scores on the SAT form a normal distribution with a mean score of 500 and a standard... (answered by Theo)

Scores on the SAT form a normal distribution with an average of 500 and a standard... (answered by ewatrrr)

Supposed the data are SAT scores and follow a normal distribution with a mean of 500 and... (answered by Theo)

Supposed the data are SAT scores and follow a normal distribution with a mean of 500 and... (answered by Boreal)