HomeworkLib
Question

A sample of experienced typists revealed that their mean typing speed is 87 words per minute...

A sample of experienced typists revealed that their mean typing speed is 87 words per minute and the median typing speed is 73 words per minute. The standard deviation of typing speed is 16.9 words per minute. What is the Pearson coefficient of skewness?

Group of answer choices

−4.2

+2.5

+4.2

−2.5

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

Solution:

Given ,

Mean = 87

Median = 73

SD = 16.9

Now ,

Pearson coefficient of skewness =  

= [3 *(73 - 87)]/16.9

= -2.5

0 0
Add a comment
Know the answer?
Add Answer to:
A sample of experienced typists revealed that their mean typing speed is 87 words per minute...
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

  • The mean number of words per minute (WPM) typed by a speed typist is 119119 with...

    The mean number of words per minute (WPM) typed by a speed typist is 119119 with a standard deviation of 1515 WPM. What is the probability that the sample mean would differ from the population mean by less than 4.14.1 WPM if 3333 speed typists are randomly selected? Round your answer to four decimal places.

  • The mean number of words per minute (WPM) typed by a speed typist is 123 with...

    The mean number of words per minute (WPM) typed by a speed typist is 123 with a standard deviation of 14 WPM. What is the probability that the sample mean would differ from the population mean by more than 1 WPM if 52 speed typists are randomly selected? Round your answer to four decimal places.

  • The mean number of words per minute (WPM) typed by a speed typist is 136136 with...

    The mean number of words per minute (WPM) typed by a speed typist is 136136 with a standard deviation of 1111 WPM. What is the probability that the sample mean would differ from the population mean by greater than 11 WPM if 7676 speed typists are randomly selected? Round your answer to four decimal places. PLEASE EXPLAIN IN CALCULATOR SPECIFALLY TI 83 PLUS

  • The mean number of words per minute (WPM) typed by a speed typist is 79 with...

    The mean number of words per minute (WPM) typed by a speed typist is 79 with a variance of 225. What is the probability that the sample mean would differ from the population mean by less than 2.7 WPM if 97 speed typists are randomly selected? Round your answer to four decimal places.

  • Hugo averages 76 words per minute on a typing test with a standard deviation of 12.5...

    Hugo averages 76 words per minute on a typing test with a standard deviation of 12.5 words per minute. Suppose Hugo's words per minute on a typing test are normally distributed. Let X= the number of words per minute on a typing test. Then, X∼N(76,12.5). Suppose Hugo types 66 words per minute in a typing test on Wednesday. The z-score when x=66 is ________. This z-score tells you that x=66 is ________ standard deviations to the ________ (right/left) of the...

  • Hugo averages 78 words per minute on a typing test with a standard deviation of 10...

    Hugo averages 78 words per minute on a typing test with a standard deviation of 10 words per minute. Suppose Hugo's words per minute on a typing test are normally distributed. Let X= the number of words per minute on a typing test. Then, X∼N(78,10). Suppose Hugo types 49 words per minute in a typing test on Wednesday. The z-score when x=49 is ________. This z-score tells you that x=49 is ________ standard deviations to the ________ (right/left) of the...

  • QUESTION 22.1 POINT Hugo averages 78 words per minute on a typing test with a standard...

    QUESTION 22.1 POINT Hugo averages 78 words per minute on a typing test with a standard deviation of 5.5 words per minute. Suppose Hugo's words per minute on a typing test are normally distributed. Let X = the number of words per minute on a typing test. Then, X-N(78,5.5). . This score Suppose Hugo types 61 words per minute in a typing test on Wednesday. The 2-score when x = 61 is tells you that x = 61 is standard...

  • Hugo averages 51 words per minute on a typing test with a standard deviation of 11...

    Hugo averages 51 words per minute on a typing test with a standard deviation of 11 words per minute. Suppose Hugo's words per minute on a typing test are normally distributed. Let X= the number of words per minute on a typing test. Then, X∼N(51,11). Suppose Hugo types 69 words per minute in a typing test on Wednesday. The z-score when x=69 is ________. This z-score tells you that x=69 is ________ standard deviations to the ________ (right/left) of the...

  • The population standard deviation for the typing speeds for secretaries is 4 words per minute. If...

    The population standard deviation for the typing speeds for secretaries is 4 words per minute. If we want to be 90% confident that the sample mean is within 1 word per minute of the true population mean, what is the minimum sample size that should be taken? z0.10 z0.05 z0.025 z0.01 z0.005 1.282 1.645 1.960 2.326 2.576 Use the table above for the z-score, and be sure to round up to the nearest integer.

  • Generally, the average typing speed is 54 words per minute (wp). A professor wanted to see...

    Generally, the average typing speed is 54 words per minute (wp). A professor wanted to see where his students stand compared to the population. He tested 28 of his students and obtained the following estimates: an average typing speed of 46 with a standard deviation of 18. What can the professor conclude with α = 0.01? If appropriate, compute the CI. If not appropriate, input "na" for both spaces below. [  ,  ] e) Compute the corresponding effect size(s) and indicate magnitude(s)....

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