Problem #34 A sample of 100 cans of coffee showed an average weight of 13 ounces. The population standard deviation is 0.8 ounces. Construct a 95.44% confidence interval for the mean of the population.
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- Please Solve In 15mins I will Thumbs-up promiseYear X Returns 18% 21 « ྂསཋ° 12345 12 Y 15% 33 14 10 -19 23 -14 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.) X Y Average returns % % do Variances Standard deviations % %1. Data: Lower control limit = 30, upper control limit = 33; overall sample mean = 31, standard deviation = 0.5. Calculate Cpk using z=3. Is the process capable? What is the Cpk? Yes, 1.33 No, 1.33 Yes, 0.67 No, 0.67 2. A machine costs $102,000 with a projected annual operating and maintenance cost of $10,000 and a salvage value of $36,000 after 3 years. If the cash flows are discounted annually at 12 percent what is the NPV? A. $2,361 B. -$100,378 C. -$121,987 D. -$48,271
- task 2. expected loss 300. find the variance and standard deviationChapter 08 Problem 8-26 LO 8-6 Use the sample sizes and the number of deviations determined below. Control Procedure 2 3 5% 10 % 5% 7% 2% 3 % Parameters Risk of incorrect acceptance Tolerable deviation rate Expected population deviation rate Sample size (using tables) Sample size (using IDEA) Results Number of deviations Sample size Sample deviation rate 1 5 % 4% 1 % Computed upper deviation rate using Tables 1-Sided upper limit using IDEA Auditor's conclusion 156 156 181 181 Does support Determine the sample deviation rate, the computed upper deviation rate, and the auditor's conclusion (i.e., testing results do or do not support operating effectiveness of the control) for each control procedure. (For Results, use Table 8-8 & Table 8-9 or IDEA) (Round your rates values to 1 decimal place.) 0 156✔ 0 2.0 ✓✔ 94 94 % % % 4 10% 8% 4% 98 98 X Answer is not complete. Control Procedure 2 Does not support 5 181✔ 2.8 6.9 ✓ % % % 3 Does not support 4 94✔ 4.3 8.7 3 333 % % % 4 Does support 3 98✔✔…Returns Year X Y 12345 11% 18% 25 26 11 10 -18 10 -23 17 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.) X Y Average returns % % Variances Standard deviations % %
- 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.)If you need $100,000 at the beginning of each year during your 18 years of returement and you can earn 6% annually during that time. What would you need to contribute at the end of each month for your 43 working years if during that time it can earn 10.8% annually?Havana Hats makes the world's best hats. Information for the last eight months follows: Month January February Number of Hats Produced 6,750 2,800 3,250 4,250 March April May June July August Suppose that Havana expects to sell 4,700 hats during the month of September and that each hat sells for $2.75. Havana performed a least-squares regression and obtained the following results: Intercept X Variable 1 Total Cost $ 7,500 3,900 4,200 5,050 8,150 7,800 3,700 6,150 6,800 Coefficients 1,255.09 0.91 4,450 6,900 7,520 Required: Prepare Havana's contribution margin income statement for the month of September. Note: Round your answers to 2 decimal places. Havana Hats Contribution Margin Income Statement Month of September ▬▬ Next
- Year 123 2 4 5 Returns X 17% 20 -7 11 10 Y 20% 32 Average returns Variances Standard deviations - 18 15 22 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. Enter your variance answers rounded to 5 decimal places, e.g., .16161.) X % % Y % %You want to estimate the mean amount of time Internet users spend on Facebook each month. How many Internet users must be surveyed in order to be 95% confident that your sample mean is within 15 minutes of the population mean? Based on results from a prior Nielsen survey, assume that the standard deviation of the population of monthly times spent on Facebook is 210 min. 249 753 1267 898 143228 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 %3D %3D take an SRS of size n = 120 and compute the average total %3D sleep time. (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?