SOLUTION: a. What is the probability that a student scored below 86 on this​ exam? The probability that a student scored below 86 is ​(Round to four decimal places as​

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Question 1072300: a. What is the probability that a student scored below 86 on this​ exam?
The probability that a student scored below 86 is
​(Round to four decimal places as​ needed.)
b. What is the probability that a student scored between 63 and 97​?
The probability that a student scored between 63 and 97 is
nothing.
​(Round to four decimal places as​ needed.)
c. The probability is 25​% that a student taking the test scores higher than what​ grade?
The probability is 25​% that a student taking the test scores higher than
nothing.
​(Round to the nearest integer as​ needed.)
d. If the professor grades on a curve​ (for example, the professor could give​ A's to the top​ 10% of the​ class, regardless of the​ score), is a student better off with a grade of 90 on this exam or a grade of 73 on a different​ exam, where the mean is 69 and the standard deviation is 44​? Show your answer statistically and explain.
A student is
worse off
better off
with a grade of 90 on this exam because the Z value for the grade of 9090 is
nothing and the Z value for the grade of 73 is
nothing.

Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
What is the probability that a student scored below 86 on this​ exam?
****you need to state the mean and standard deviation