Question

A set of final examination grades in a calculus course was found to be normally distributed...

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

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Mean = = 69

Standard deviation = = 9

We have to find the probability of getting a grade of 91 or less on this exam.

That is we have to find P(X 91)

For finding this probability we have to find z score.

That is we have to find P(Z 2.44)

P(Z 2.44) = 0.9927    ( Using z table)

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A set of final examination grades in an introductory statistics course is normally distributed, with 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?
A set of final examination grades in an introductory statistics course is normally distributed, with a...
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...
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...
Question 1 1. A set of final examination grades in an introductory statistics course is normally...
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...
uestion 1 1. A set of final examination grades in an introductory statistics course is normally...
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...
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...
a set of final examination grades in an introductory statistics course is normally distributed with a...
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...
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...
A set of Midterm examination grades in “Decision making under uncertainty” course is normally distributed, with...
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...
The next two questions 4-5 are based on the following information. A set of final examination...
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...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT