Question

A local university hosted an elementary reading class for area elementary students. There was a before and after exam given t
2 6 12 9 16 11 24 11 22 28 12 7 13 4 7 a. Compute the sample covariance for the above data (rounded to the nearest hundredths
0 0
Add a comment Improve this question Transcribed image text
Answer #1

2 Page Xi Xi-la Yi Yi-uly Eli - L19). ( Vi - Uy) 2 (xi-lo) ( را - 7 ) 2 -5.75 5 -10.875 62- 53125 33. 0625 118. 265625 -1.75National Dec Xi Xi-L У Yi-ly - us) . (Vi - uy ) -5-70 5 - 10- 375 62. 5 31 29 - 1-75 12 - 3.8 75 6. 78 12 5 9 1:25 10 0.1 25Nahara 2 Dare Page 2. ( ولد - X Tilly) 33 0626 118، 286 25 ک2 06 • PS.OTL25 625؟ (-01 56 2S /60 5 25 66. 05625 6.5625 37. S4National Date Staudavel Deviction for u on = 91.5 8 3.3819 = VII.4375 - 3.3819 ains Staudamel Deviation for y 470.875 58.8594

Add a comment
Know the answer?
Add Answer to:
A local university hosted an elementary reading class for area elementary students. There was a before...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

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 following data represent the unit price (x is dollars) and daily demand (y in units)...

    The following data represent the unit price (x is dollars) and daily demand (y in units) of a product. Unit Price ($x) Unit demand ) 14 + 4 12 11 8 7 7 9 a. Compute the mean of x. D b. Compute the mean of y. C. Compute the sample covariance for the data. d. Compute the standard deviation of x. D e. Compute the standard deviation of y. D f. Compute the sample correlation coefficient. g. Explain what...

  • Statistics 214 Section 5. Thousands of elementary school students in a region were recently given a...

    Statistics 214 Section 5. Thousands of elementary school students in a region were recently given a nationwide standardized exam to test their writing skills. In a simple random sample of 280 students, 192 students passed this exam. a) Construct a 99% confidence interval for the proportion of elementary school students in the region who passed the exam. Round the endpoints of the interval to three decimal places. b) Using a complete sentence, interpret the confidence interval in the context of...

  • Case Study Chapter 7 Elementary Statistics This case study is about a study on coffee consumption...

    Case Study Chapter 7 Elementary Statistics This case study is about a study on coffee consumption of people that live in the United States. In total, 92 people were randomly selected and data was gathered regarding the annual consumption of coffee in gallons. Of these 92, 51 were females and 41 were males. You must show all work and formulas used in order to receive full credit. This includes showing all steps of the appropriate hypothesis test from the chapter...

  • 5 7 8 10 11 12 Suppose a teacher recorded the attendance of her students in...

    5 7 8 10 11 12 Suppose a teacher recorded the attendance of her students in a recent statistics class because she wanted to investigate the linear relationship between the number of classes they missed and their final grades. The accompanying table shows these data for a random sample of nine students. Complete parts a through c. Click the icon to view the table showing missed classes and final grade. a. Calculate the correlation coefficient for this sample. The correlation...

  • x 7 10 8 4 3 y 8 11 9 5 4 a. Calculate the covariance...

    x 7 10 8 4 3 y 8 11 9 5 4 a. Calculate the covariance between the variables. (Negative value should be indicated by a minus sign. Round your intermediate calculations to 4 decimal places and final answer to 2 decimal places.) b-1. Calculate the correlation coefficient. (Round your intermediate calculations to 4 decimal places and final answer to 2 decimal places.) b-2. Interpret the correlation coefficient.   There is _____ no, a weak negative, a weak positive, a strong...

  • Matching.. 1 correlation 2.covariance 3. deviation 4.mean 5. median 6. mode 7. range 8. residual 9....

    Matching.. 1 correlation 2.covariance 3. deviation 4.mean 5. median 6. mode 7. range 8. residual 9. sample size 10. standard deviation 11. standard error 12. Variance a. the difference between an observed value and the ,ean of the set of valies is a quantifies the direction and stregnth of a linear relationship between two quantitive variables is the average of the squared deviations of a dataset c. the d.of the three measures of central tendency, the___is affected the most by...

  • From a random sample of 17 students in an introductory finance class that uses group-learning techniques,...

    From a random sample of 17 students in an introductory finance class that uses group-learning techniques, the examination scores were found to be normally distributed with mean 20 and sample standard deviation 3. For an independent random sample of 11 students in another introductory finance class that does not use group-learning techniques, the examination scores were found to be normally distributed with mean 38 and standard deviation 2, respectively. Estimate with 90% confidence the difference between the two population mean...

  • 5. Calculate the coefficient of determination (Rsquared) for the above portfolio 6. What does the coefficient...

    5. Calculate the coefficient of determination (Rsquared) for the above portfolio 6. What does the coefficient of determination tell us? 7. What is the beta of the above portfolio? 8. What is the expected return on ZYX stock given the following: Return on the market 8% Beta 1.3 Treasury bill rate 2.5% 9. What is the expected return on CBA stock given the following: Beta .5 Risk free rate 3.1% Return on the market 15.7% 10. What is the expected...

  • EXTRA RISK PROBLEMS Stock A Stock B Expected Return 10% 16% Standard Deviation Correlation coefficient with...

    EXTRA RISK PROBLEMS Stock A Stock B Expected Return 10% 16% Standard Deviation Correlation coefficient with the Market Correlation coefficient with Stock B Risk free rate 25% Expected return on the Market 12% Standard deviation of the Market 18 1. What is the expected return on a portfolio comprised of $6000 of Stock A and $4000 of Stock B? 2. What is the Standard deviation of this portfolio? 3. Does it make sense to combine these two in this way?...

  • 1) Consider the following data for ALL Los Angeles Rams home games for the 2018 NFL...

    1) Consider the following data for ALL Los Angeles Rams home games for the 2018 NFL season: Points Offensive yards 34 432 35 521 38 556 29 416 36 456 54 455 23 407 48 377 a) Compute the points and offensive yards. (2 points) b) Compute the standard deviation of points and offensive yards. (5 points) c) Compute the covariance between points and offensive yards. Provide an interpretation of the covariance. (7 points) d) Compute the correlation coefficient between...

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
ADVERTISEMENT