28 Total sleep time of college students. In Example 4, the total sleep time per night among college students was approximately Normally distributed with mean u = 6.78 hours and standard deviation o = 1.24 hours. You plan to take an SRS of size n = 120 and compute the average total sleep time. %3D %3D %3D (a) What is the standard deviation for the average time? (b) Use the 95 part of the 68-95-99.7 rule to describe the variability of this sample mean. (c) What is the probability that your average will be below 6.9 hours?

28 Total sleep time of college students. In Example 4, the total sleep time per night among college students was approximately Normally distributed with mean u = 6.78 hours and standard deviation o = 1.24 hours. You plan to take an SRS of size n = 120 and compute the average total sleep time. %3D %3D %3D (a) What is the standard deviation for the average time? (b) Use the 95 part of the 68-95-99.7 rule to describe the variability of this sample mean. (c) What is the probability that your average will be below 6.9 hours?

FINANCIAL ACCOUNTING

10th Edition

ISBN:9781259964947

Author:Libby

Publisher:Libby

Chapter1: Financial Statements And Business Decisions

Section: Chapter Questions

Problem 1Q

See similar textbooks

Similar questions

Fast pls solve this question correctly in 5 min pls I will give u like for sure Savit how to calculate Variance and SD from this data?
Refer to the graph below. It shows 2 indifference curves: for person A and for person B. Which person, A or 4) B, is relatively more likely to take on the risk when the probability of injury at work is 70%? Explain why. Make sure to indude the analysis of the difference in the shape of the 2 curves. Be as detailed as possible. Wage UA Probability of Injury Figure 1. Indifference Curves of Person A and Person B
Please Solve In 15mins I will Thumbs-up promise
Consider the following five monthly returns: 0.04 −0.03 0.03 0.07 −0.02 a. Calculate the arithmetic average monthly return over this period. b. Calculate the geometric average monthly return over this period. c. Calculate the monthly variance over this period. d. Calculate the monthly standard deviation over this period.
Use the following returns for X and Y. Returns Year 1 22.8% 29.4% - 17.8 10.8 4.8 31.4 4 21.6 - 16.6 5.8 35.4 a. Calculate the average returns for X and Y. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) b. Calculate the variances for X and Y. (Do not round intermediate calculations and round your answers to 6 decimal places, e.g., 32.161616.) c. Calculate the standard deviations for X and Y. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) Y a. Average return % % b. Variance с. Standard deviation %
Year INM +5 3 4 Returns 14% 28 9 10 Y 18% 29 10 -26 20 Using the returns shown above, calculate the arithmetic average returns, the variances, and the standard deviations for X and Y. (Do not round intermediate calculations. Enter your average return and standard deviation answers as a percent rounded to 2 decimal places, e.g., 32.16, and round the variance answers to 5 decimal places, e.g., 16161.) Average returns Variances Standard deviations X 8.00 % 17.90 % Y 10,20 % 21.34 %
Use the following returns for X and Y. Year 1 2 3 4 5 Returns X 22.1% -17.1 10.1 20.2 5.1 Y 27.3% -4.1 29.3 -15.2 33.3 a. Calculate the average returns for X and Y. Note: Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16. b. Calculate the variances for X and Y. Note: Do not round intermediate calculations and round your answers to 6 decimal places, e.g., .161616. c. Calculate the standard deviations for X and Y. Note: Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16. X Answer is complete but not entirely correct. X 8.06 a. Average return b. Variance c. Standard deviation 136.454400 % 11.67 X % Y 14.04 377.286400 x % 19.42%
Year a. b. 12345 C. Returns X 22.0% 17.0 10.0 20.0 5.0 a. Calculate the average returns for X and Y. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) b. Calculate the variances for X and Y. (Do not round intermediate calculations and round your answers to 6 decimal places, e.g., 32.161616.) c. Calculate the standard deviations for X and Y. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) Y 27.0% 4.0 29.0 - 15.0 33.0 X Answer is complete but not entirely correct. Average return Variance Standard deviation X 8.00 2.445000 x 15.64 % % Y 14.72 X % 4.501920 X 21.22 X %
Use the following returns for X and Y. Returns Year x y 1 21.8% 26.4% 2 -16.8 -3.8 3 9.8 28.4 4 19.6 -14.6 5 4.8 32.4 a. Calculate the average returns for X and Y. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) b. Calculate the variances for X and Y. (Do not round intermediate calculations and round your answers to 6 decimal places, e.g., 32.161616.) c. Calculate the standard deviations for X and Y. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.)
Over the past four days, the realized values of the random variable A are: 8, -2, 2 and 11. In the same order, the realized values of the random variable B are: 6, 2, 2 and -10. Compute the correlation between A and B.
Please help me
M