Question

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.

a) What is the probability that a student scored below 89 on this exam? (Round to 4 decimal places as needed.)

b) What is the probability that a student scored between 63 and 95? (Round to 4 decimal places ad needed.)

c) The probability is 5% that a student taking the test scores higher than what grade? (Round to the nearest integer as needed.)

d) If the professor grades on a curve (for example, the professor could give As to the top 10% of the class regardless of the score), is a student better off with a score of 81 on this exam or a grade of 71 on a different exam, where the mean is 63 and the standard deviation is 4? Explain by giving the Z value of both scores.

Answer #1

A set of final examination grades in an introductory statistics
course is normally distributed, with a mean of 70 and a standard
deviation of 9.
What is the probability that the student scored below 88 on this
exam
What is the probability that a student scored between 61 and
92.5
The probability is 5% that a student taking the test scores
higher than what grade
If the professor grades on a curve --gives A’s to the top 10% of
the...

a set of final examination grades in an introductory
statistics course is normally distributed with a mean of 77 and a
standard deviation of 7 complete parts a through d.
a. what is the probability that a student scored below 89 on this
exam
b. what is the probability that a student scored between 70 and
93
c. the probability is 15% that a student taking the test scores
higher than what grade
d. if the professor grades on a...

uestion 1
1. A set of final examination grades in an introductory
statistics course is normally distributed with a mean of 73 and a
standard deviation of 8.
a) What is the probability of getting a grade of 91or less on
this exam?
b) what is the probability that a student scored between 65
and 89?
c) The probability is 5% that a student taking the test scores
higher than than what grade?
d) If the professor grades on a...

A set of final examination grades in an introductory statistics
course is normally distributed, with a mean of 73 and a standard
deviation of 8.2.
(i) What is the probability that a student scored below 91 on this
exam?
(ii) What is the probability that a student scored between 65 and
89?
(iii) Given that 15% of the students scored grade B. What is the
cut-off mark for grade B?

Question 1
1. A set of final examination grades in an introductory
statistics course is normally distributed with a mean of 85 and a
standard deviation of 12.
a) What is the probability of getting a grade of 95 on this
exam?
b) What is the probability that a student scored less than 55
and more than79?
c) The probability is 8% that a student taking the test scores
higher than than what grade?
d) If the professor grades on...

A set of Midterm examination grades in “Decision making under
uncertainty” course is normally distributed, with a mean of 79 and
a standard deviation of 7. Complete parts (a) through (d).
a) What is the probability that a student scored below 88 on
this exam?
b) What is the probability that a student scored between 72 and
94?
c) The probability is 15% that a student taking the test scores
higher than what grade?
d) If the professor grades on...

a set of final examination grades in an introductory
statistics course is normally distributed with a mean of 77 and a
standard deviation of 8.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 ?

PROBLEM: A set of final examination grades in an introductory
statistics course was found to be normally distributed with a mean
of 73 and a standard deviation of 8.
Use Excel to determine the following values to 6 (round up)
decimal place accuracy.
Fill in the following values.
1. Determine the probability of getting a grade that is less
than 85.Answer____________________________________
2. Determine the probability of getting a grade that is greater
than 90.Answer__________________________________
3. Determine the probability of getting...

The next two questions 4-5 are based on the following
information.
A set of final examination grades in an introductory statistics
course is normally distributed, with a mean of 73 and a standard
deviation of 8. 4.
What is the probability that a student scored below 91 on this
exam?
(a) 0.9878 (b) 0.8185 (c) 0.9500 (d) 0.8616 5.
If the professor grades on a curve (i.e., gives As to the top 10
percent of the class, regardless of the...

A set of final examination grades in a calculus course was found
to be normally distributed with a mean of 69 and a standard
deviation of 9. What is the probability of getting a grade of 91 or
less on this exam?
0.50
.9927
0.0073
1.00

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