Question

a student scores a 40 on an exam with a mean of 50 and a standard...

a student scores a 40 on an exam with a mean of 50 and a standard deviation of 20. calculate the z score
Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Given that,

student score = x = 40

mean = = 50

standard deviation = = 20

z score = (x-) /

z score = (40-50)/20

z score = -10/20

z score = -0.5

----------------------------------------------------------------------The End ------------------------------------------------------------------------

If you have any doubt please ask me friend and if you are satisfied with my solution please give me thumb up.

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
Student scores on Professors' Stats final exam are normally distributed with a mean of 72 and...
Student scores on Professors' Stats final exam are normally distributed with a mean of 72 and a standard deviation of 6.9 Find the probability of the following: **(use 4 decimal places)** a.) The probability that one student chosen at random scores above an 77. b.) The probability that 20 students chosen at random have a mean score above an 77. c.) The probability that one student chosen at random scores between a 67 and an 77. d.) The probability that...
Student scores on Professor Combs' Stats final exam are normally distributed with a mean of 73...
Student scores on Professor Combs' Stats final exam are normally distributed with a mean of 73 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 78. b.) The probability that 20 students chosen at random have a mean score above an 78. c.) The probability that one student chosen at random scores between a 68 and an 78. d.) The probability...
Student scores on Professor Combs' Stats final exam are normally distributed with a mean of 73...
Student scores on Professor Combs' Stats final exam are normally distributed with a mean of 73 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 78. b.) The probability that 20 students chosen at random have a mean score above an 78. c.) The probability that one student chosen at random scores between a 68 and an 78. d.) The probability...
Problem part A - In a large distribution of exam scores with a mean of 43...
Problem part A - In a large distribution of exam scores with a mean of 43 and a standard deviation of 12, what is the cutoff (minimum) score for person in the top 20% of the group? Part b- In the same distribution, what are the boundary scores for those who score more than 25% of the group but up to 50% of the group? (The second Quartile). Part C- - On a specific IQ test, with a mean of...
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...
The mean for a set of test scores is 50 and the standard       deviation is...
The mean for a set of test scores is 50 and the standard       deviation is 5. For a raw score (X) of 55, the corresponding z      score is +1.0. What is the z score if the standard deviation is    2.5? From this example, what can you conclude is the effect of        decreasing the amount of variability of a set of scores on a           standard score (given all else is equal, such as the same raw...
The scores of students on an exam are normally distributed with a mean of 250 and...
The scores of students on an exam are normally distributed with a mean of 250 and a standard deviation of 40. (a) What is the first quartile score for this exam? (Recall that the first quartile is the value in a data set with 25% of the observations being lower.) Answer: (b) What is the third quartile score for this exam? Answer:
Suppose a professor gives an exam to a class of 40 students and the scores are...
Suppose a professor gives an exam to a class of 40 students and the scores are as follows. (Type the data set in StatCrunch.) 35 44 46 47 47 48 49 51 53 54 55 55 57 57 57 58 59 59 59 59 60 60 60 60 60 62 62 62 64 68 69 70 72 73 73 75 75 77 82 88     a.    Find each of the following: Mean: Median: Standard deviation: Z-score for a student who...
In your psychology class, the mean exam score is 72 and the standard deviation is 12....
In your psychology class, the mean exam score is 72 and the standard deviation is 12. You scored 78. In your biology class, the mean exam score is 56 and the standard deviation is 5. You scored 66. If your professors grade "on a curve" (i.e., according to the distribution of scores), for which exam would you expect to get a better grade? (Hint: Convert your exam scores to z-scores). A) Biology B) Psychology
The scores on a psychology exam were normally distributed with a mean of 58 and a...
The scores on a psychology exam were normally distributed with a mean of 58 and a standard deviation of 9. What is the standard score for an exam score of 57​? The standard score is ______
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT