of final examination grades in an introductory statistics course is normally distributed, with a mean of 72 and a standard deviation of 9. Complete parts (a) through (d). .a. What is the probability that a student scored below 88 on this exam? The probability that a student scored below 88 is? (Round to four decimal places as needed.) b.
of final examination grades in an introductory statistics course is normally distributed, with a mean of 72 and a standard deviation of 9. Complete parts (a) through (d). .a. What is the probability that a student scored below 88 on this exam? The probability that a student scored below 88 is? (Round to four decimal places as needed.) b.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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A set of final examination grades in an introductory statistics course is normally distributed , with a mean of 72 and a standard deviation of 9.
Complete parts (a) through (d).
Complete parts (a) through (d).
.a.
What is the The probability that a student scored below 88 is?
(Round to four decimal places as needed.)
b.
What is the probability that a student scored between 63 and 94?The probability that a student scored between 63 and 94 is?
(Round to four decimal places as needed.)
c.
The probability is 15% that a student taking the test scores higher than what grade?The probability is 15% that a student taking the test scores higher than?
(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 the exam with a mean of 72 and a standard deviation of 9 or a grade of 73 on a different exam, where the mean is 69 and the standard deviation is 4?Show your answer statistically and explain.
A student is
▼
better off OR
worse off
with a grade of
90
on the exam with a mean of
72
and a standard deviation of
9
because the Z value for the grade of
90
is
nothing
and the Z value for the grade of
73
on the different exam is
nothing.
(Round to two decimal places as needed.)
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