HomeworkLib
Question

A teacher informs his organic chemistry class (of 500+ students) that a test was very difficult,...

A teacher informs his organic chemistry class (of 500+ students) that a test was very difficult, but the grades would be curved. Scores on the test were normally distributed with a mean of 33 and a standard deviation of 8.7. The maximum possible score on the test was 100 points.
Because of partial credit, scores were recorded with 1 decimal point accuracy. (Thus, a student could earn a 33.2, but not a 32.73.) The grades are curved according to the following scheme.

Find the numerical limits for each letter grade.

Letter Scheme Interval
A Top 14%
B Scores above the bottom 65% and below the top 14%
C Scores above the bottom 35% and below the top 35%
D Scores above the bottom 14% and below the top 65%
F Bottom 14%

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
A teacher informs his organic chemistry class (of 500+ students) that a test was very difficult,...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • An English professor assigns letter grades on a test according to the following scheme A: Top...

    An English professor assigns letter grades on a test according to the following scheme A: Top 15% of scores B: Scores below the top 15 % and above the bottom 64 % C: Scores below the top 36 % and above the bottom 21 % D: Scores below the top 79 % and above the bottom 8 % F: Bottom 8% of scores Scores on the test are normally distributed with a mean of 76.5 and a standard deviation of...

  • A psychology professor assigns letter grades on a test according to the following scheme. A: Top...

    A psychology professor assigns letter grades on a test according to the following scheme. A: Top 8% of scores B: Scores below the top 8% and above the bottom 60% C: Scores below the top 40% and above the bottom 18% D: Scores below the top 82% and above the bottom 9% F: Bottom 9% of scores Scores on the test are normally distributed with a mean of 67.7 and a standard deviation of 8.5. Find the numerical limits for...

  • A psychology professor assigns letter grades on a test according to the following scheme. A: Top...

    A psychology professor assigns letter grades on a test according to the following scheme. A: Top 9% of scores B: Scores below the top 9% and above the bottom 58% C: Scores below the top 42% and above the bottom 15% D: Scores below the top 85% and above the bottom 9% F: Bottom 9% of scores Scores on the test are normally distributed with a mean of 74.6 and a standard deviation of 7.8. Find the numerical limits for...

  • An English professor assigns letter grades on a test according to the following scheme. A: Top...

    An English professor assigns letter grades on a test according to the following scheme. A: Top 5%5% of scores B: Scores below the top 5%5% and above the bottom 63%63% C: Scores below the top 37%37% and above the bottom 16%16% D: Scores below the top 84%84% and above the bottom 5%5% F: Bottom 5%5% of scores Scores on the test are normally distributed with a mean of 81.181.1 and a standard deviation of 8.98.9. Find the numerical limits for...

  • A history teacher assigns letter grades of an E on a test according to the bottom...

    A history teacher assigns letter grades of an E on a test according to the bottom 10%. If scores on the test are normally distributed with a mean of 68 and a standard deviation of 12.5. Find the numerical limits for the Bottom 10%. Below 52 Below 12.5 Below 68 Below 54

  • A humanities professor assigns letter grades on a test according to the following scheme. The grade...

    A humanities professor assigns letter grades on a test according to the following scheme. The grade of an A is given to the top 13% of scores in the class. The grade of a B is given to the scores below the top 13% and above the bottom 60%. The grade of a C is given to the scores below the top 40% and above the bottom 24%. The grade of a D is given to the scores below the...

  • An English professor assigns letter grades on a test according to the following scheme. A: Top...

    An English professor assigns letter grades on a test according to the following scheme. A: Top 13% of scores B: Scores below the top 13% and above the bottom 60 % C. Scores below the top 40% and above the bottom 24% D: Scores below the top 76% and above the bottom 8 % F: Bottom 8% of scores Scores on the test are normally distributed with a mean of 77.4 and a standard deviation of 7.9. Find the numerical...

  • An English professor assigns letter grades on a test according to the following scheme. A: Top...

    An English professor assigns letter grades on a test according to the following scheme. A: Top 9% of scores B: Scores below the top 9% and above the bottom 61% C: Scores below the top 39% and above the bottom 25% D: Scores below the top 75% and above the bottom 10% F: Bottom 10% of scores Scores on the test are normally distributed with a mean of 72.3 and a standard deviation of 8 . Find the minimum score...

  • A sociology professor assigns letter grades on a test according to the following scheme. A: Top...

    A sociology professor assigns letter grades on a test according to the following scheme. A: Top 13% of scores B: Scores below the top 13% and above the bottom 61% C: Scores below the top 39% and above the bottom 20% D: Scores below the top 80% and above the bottom 9% F: Bottom 9% of scores Scores on the test are normally distributed with a mean of 73.5 and a standard deviation of 7.9 Find the minimum score required...

  • A humanities professor assigns letter grades on a test according to the following scheme. A: Top...

    A humanities professor assigns letter grades on a test according to the following scheme. A: Top 13% of scores B: Scores below the top 13% and above the bottom 60 % C: Scores below the top 40 % and above the bottom 23 % D: Scores below the top 77 % and above the bottom 8 % F: Bottom 8 % of scores Scores on the test are normally distributed with a mean of70 and a standard deviation of 9.6...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT