Question

Scores on a statistics final in a large class were normally distributed with a mean of...

Scores on a statistics final in a large class were normally distributed with a mean of 79 and a standard deviation of 12 . Use the Cumulative Normal Distribution Table to answer the following.

(a) What proportion of the scores were above 90 ?

(b) What proportion of the scores were below 66 ?

(c) What is the probability that a randomly chosen score is between 74 and 80 ? Round answers to at least four decimal places.

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

Homework Answers

Answer #1

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
6.1 question 19 school grades: Scores on a statistics final in a large class were normally...
6.1 question 19 school grades: Scores on a statistics final in a large class were normally distributed with a mean of 74 and a standard deviation of 8. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least four decimal places. (a) What proportion of the scores were above 85? (b) What proportion of the scores were below 63? (c) What is the probability that a randomly chosen score is between 65 and 82?
Scores of students in a large Statistics class are normally distributed with a mean of 75...
Scores of students in a large Statistics class are normally distributed with a mean of 75 points and a standard deviation of 5 points. Find the probability that a student scores more than 80 points If 100 students are picked at random, how many do you expect to score below 70 points? If top 10% of students obtain an A grade, how much should a student obtain to get an A grade. Suppose four students are picked at random, find...
In a large section of a Statistics class. The scores for the final are normally distributed,...
In a large section of a Statistics class. The scores for the final are normally distributed, with a mean of 75 (µ) and a standard deviation of 8 (σ). Grades are assigned according to the following (partial) rule: • The top 10% receive “A”s. • Those with scores 64 or below receive “F”s. (a) What is the cutoff level for “A”s (the minimum score on the exam for an “A”)? (5 pts.) (b) What percent of students get “F”s? (5...
The final exam scores in a statistics class were normally distributed with a mean of 70...
The final exam scores in a statistics class were normally distributed with a mean of 70 and a standard deviation of five. What is the probability that a student scored more than 75% on the exam?
Scores of students in a large Statistics class test are normally distributed with a mean of...
Scores of students in a large Statistics class test are normally distributed with a mean of 75 points and a standard deviation of 5 points.Find the probability that a student scores more than 80 pointsIf 100 students are picked at random, how many do you expect to score below 70 points?If top 10% of students obtain an A grade, how much should a student obtain to get an A grade.Suppose four students are picked at random, find the probability that...
Scores on a recent national statistics exam were normally distributed with a mean of 82 and...
Scores on a recent national statistics exam were normally distributed with a mean of 82 and a standard deviation of 4. What is the probability that a randomly selected exam will have a score of at least 87? What percentage of exams will have scores between 80 and 85? If the top 3% of test scores receive merit awards, what is the lowest score eligible for an award?
The scores for the final exam in a particular class are approximately normally distributed with a...
The scores for the final exam in a particular class are approximately normally distributed with a meann of 78.4 points and standard deviation of 5.7. A. What score would a student nneed to score inn the top 20% of sudent scores? Round two decimal places. B. What is the probablity that a randomly selected group of 36 students will have a eman score of more than 80 points? Innclude a probability statement. Round four decimal places.
Student scores on the Stats final exam are normally distributed with a mean of 75 and...
Student scores on the Stats final exam are normally distributed with a mean of 75 and a standard deviation of 6.5 Find the probability of the following: (use 4 decimal places) a.) The probability that one student chosen at random scores above an 80. b.) The probability that 10 students chosen at random have a mean score above an 80. c.) The probability that one student chosen at random scores between a 70 and an 80. d.) The probability that...
Assume that statistics scores that are normally distributed with a mean 75 and a standard deviation...
Assume that statistics scores that are normally distributed with a mean 75 and a standard deviation of 4.8 (a) Find the probability that a randomly selected student has a score greater than 72. (b) Find the probability that a randomly selected student has a score between 70 and 80. (c) Find the statistics score separating the bottom 99.5% from the top 0.5%. (d) Find the statistics score separating the top 64.8% from the others.
Scores on Professor Combs' Statistics Final Exams have a long term history of being normally distributed,...
Scores on Professor Combs' Statistics Final Exams have a long term history of being normally distributed, with a mean of μμ = 72 and a standard deviation of σσ = 9 a.) Find the probability that a single student will score above a 77 on the Final exam. b.) Find the probability that a single student will score between a 67 and 77 on the Final exam. c.) Find the probability that an entire class of 20 students will have...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT