HomeworkLib
Question

You score a 105 on Exam 1 which has a mean of 30 and a standard...

You score a 105 on Exam 1 which has a mean of 30 and a standard deviation of 28. Then you score 675 on Exam 2 with a mean of 493 and a standard deviation of 150.

(Round numerical answers to one decimal place)

a) How many standard deviations are you away from the mean on Exam 1?

b) Which score is better? (Click to select)The score of 105The score of 675Both scores have the same relative positionUnable to determine with given information

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

a)

z-score of Exam 1

= (105 - 30)/28

= 2.6786

b)

Exam 2

z-score = (675 - 493)/150

= 1.21333

Since z-score of Exam 1 > z-score of Exam 2

The score of 105   is better

0 0
Add a comment
Know the answer?
Add Answer to:
You score a 105 on Exam 1 which has a mean of 30 and a standard...
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

  • You score a 93 on Exam 1 which has a mean of 55 and a standard...

    You score a 93 on Exam 1 which has a mean of 55 and a standard deviation of 16. Then you score 687 on Exam 2 with a mean of 493 and a standard deviation of 150. (Round numerical answers to one decimal place) a) How many standard deviations are you away from the mean on Exam 1? b) Which score is better?  (Click to select)  The score of 93  The score of 687  Both scores have the same relative position  Unable to determine with...

  • The mean exam score for 44 male high school students is 20.1 and the population standard...

    The mean exam score for 44 male high school students is 20.1 and the population standard deviation is 4.7. The mean exam score for 58 female high school students is 19.6 and the population standard deviation is 4.1. At a = 0.01, can you reject the claim that male and female high school students have equal exam scores? Complete parts (a) through (e). Click here to view page 1 of the standard normal distribution table. Click here to view page...

  • 11. A distribution of exam scores has a mean of μ = 78. a.If your score...

    11. A distribution of exam scores has a mean of μ = 78. a.If your score is X = 70, which standard deviation would give you a better grade: σ = 4 or σ = 8? Answer: ________________ b.If your score is X = 80, which standard deviation would give you a better grade: σ = 4 or σ = 8? Answer: ___________________ 12. For each of the following, identify the exam score that should lead to the better grade....

  • The mean score on a college placement exam is 550 with a standard deviation of 150....

    The mean score on a college placement exam is 550 with a standard deviation of 150. If the scores vary normally, 90% of the test takers score above which score? Question 3 options: 358         742 886 336   

  • Example: In a class of 3 students, the average score on the final exam is 75%...

    Example: In a class of 3 students, the average score on the final exam is 75% and standard deviation of 5%. Amy got 80% on the final exam. How many standard deviations better than the mean is that? Mandy got 70%. How many standard deviations is Mandy's score deviate from the mean? Judy got 75%. How many standard deviation is Judy's score deviate from the mean?

  • The scores on a psychology exam were normally distributed with mean of 55 and a standard...

    The scores on a psychology exam were normally distributed with mean of 55 and a standard deviation of 5. A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed? The cutoff for a failing score was 45. (Simplify your answer.) Approximately percent of the students failed. (Round to one decimal place as needed.)

  • 14. On an exam with a mean of μ = 70, you have a score of...

    14. On an exam with a mean of μ = 70, you have a score of X = 75. Which of the following values for the standard deviation would give you the highest position within the class? Hint: Graph the mean and figure out which standard deviation makes the most sense for getting a high score. How far away from the mean do we want the score of 75 to be? a. σ = 1 b. σ = 5 c....

  • Find the indicated score. The graph depicts the standard normal distribution with mean and standard deviation...

    Find the indicated score. The graph depicts the standard normal distribution with mean and standard deviation 1 Click to view page 1o the table Click to view page of the The indicated z score is Round to two decimal places as needed Find the area of the shaded region. The graph to the right depicts I scores of adults and those scores we normally distributed with a mean of 100 and a standard deviation of 15 Click to view.age 1...

  • QUESTION 20 The mean score on a standardized exam is 320 with a standard deviation of...

    QUESTION 20 The mean score on a standardized exam is 320 with a standard deviation of 40. Suppose 100 scores are randomly selected and you need to determine the probability that the sample mean is less than 310. Calculate the z-score necessary to do this 0.25 2.50 -2.50 -0.25

  • If the mean exam score of a class was 75%, with a standard deviation of 15%,...

    If the mean exam score of a class was 75%, with a standard deviation of 15%, what percent of students would be expected score at or higher than 92%? Assume that the distribution of the scores is normal and the variable is random.

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