The scores of the students on a standardized test are normally distributed, with a mean of 500 and a standard deviation of 110. What is the probability that a randomly selected student has a score between 350 and 550

The probability that a randomly selected student has a score between 350 and 550  = 0.5867

Step-by-step explanation:

Mean = 500

Standard deviation = 110

Let X be the score of student in a standardized test

The probability that a randomly selected student has a score between 350 and 550  =

 =

                              =       Putting  

                              =

                              = 0.6736 - .0869     ( Using Z table )

                              = 0.5867

add the numbers under frequency to find the total number:

5 + 8 +7 + 4 + 0 +1 = 25

the answer is 25.

if your equation is in the form ax2 + bx + c, you can find the maximum by using the equation:

max = c - (b2 / 4a).

the first step is to determine whether your equation gives a maximum or minimum.

-x2 + 4x - 2.     thats an example hope it