Please use the accompanying Excel data set or accompanying Text filedata set when completing the following exercise.An article in the ASCE Journal of Energy Engineering ("Overview ofReservoir Release Improvements at 20 TVA Dams," Vol. 125, April1999, pp. 1-17) presents data on dissolved oxygen concentration fromstreams below 20 dams in the Tennessee Valley Authority system. Thesample mean from the observations is = 3.266 and the samplestandard deviation is s = 2.127. Assume population is approximatelynormally distributed.Round your answers to 2 decimal places.(a) Calculate the 95% two-sided confidence interval on the mearoxygen concentration.sHS ii(b) Calculate the 95% two-sided prediction interval on the dissolvedoxygen concentration for the next stream that will be tested.i(c) Find an interval that will contain 95% of the values of the dissolvedoxygen concentration with 99% confidence.

The confidence interval is calculate using the observations sample statistic, standard deviation and…

Answered: An article in the ASCE Journal of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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An employment information service claims the mean annual salary for senior level product engineers is $96,000. The annual salaries (in dollars) for a random sample of 16 senior level product engineers are shown in the table to the right. At a=0.10, test the claim that the mean salary is $96.000. Complete parts (a) through (e) below. Assume the population is normally distributed (a) Identify the claim and state Ho and H₂. Ho Y M H₂ N ▼ (Type integers or decimals. Do not round.) The claim is the hypothesis. (b) Use technology to find the critical value(s) and identify the rejection region(s). The critical value(s) is/are to (Use a comma to separate answers as needed. Round to two decimal places as needed.). Choose the graph which shows the rejection region О А. 15-6.176 4 -ho to Q Q (c) Find the standardized test statistic, t The standardized test statistic is t- (Round to two decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis. Ho because the…
7:08 iTECH Part V ork.potsdam.edu Part VI © 4G37% 5 What graphical display is appropriate for comparing the distribution of patient death rates between hospitals that use computer systems and those that rely on the âlpaperâ system? A. A scatterplot. B. A bar chart. C. A stem-and-leaf display. D. Side-by-side boxplots. 4 Mr. Prudence read about the study results and concluded from there that hospitals should adopt computerized automation of notes and records because it increases patientsâ chance of survival. Which of the following is a correct statement about Mr. Prudenceâs conclusion? A. It is a valid conclusion because the study was based on a very large number of patients. B. It is a valid conclusion because the study results showed that hospitals which use computerized systems have a lower patient death rate. C. It is an invalid conclusion because this study does not necessarily prove a causal relationship between the use of ||| computerized system and hospital mortality. D. Both A)…
Rachael got a 660 on the analytical portion of the Graduate Record Exam (GRE). If GRE scores are normally distributed and have mean μ = 600 and standard deviation σ = 30, what is her standardized score?
The frequency distribution was obtained using a class width of 0.5 for data on cigarette tax rates. Use the frequency distribution to approximate the population mean and population standard deviation. Compare these results to the actual mean μ=$1.502 and standard deviation σ=$1.031.
Based on the data of air pollution in Los Angeles in 2019, the Environmental Protection Agency (EPA) decided to publish a new stricter regulation effective in January 2020 to reduce hydrocarbon pollution. EPA wants to evaluate whether the new regulation makes significant differences in reducing pollution. EPA collects data of monthly hydrocarbon pollution level as follows: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2019 7.3 6.0 5.4 5.9 3.9 5.7 6.9 7.6 6.3 5.8 5.1 5.9 2020 5.3 6.1 5.6 5.7 3.7 4.7 6.1 7.2 6.4 5.7 4.9 5.8
Please use the accompanying Excel data set or accompanying Text file data set when completing the following exercise. An article in the ASCE Journal of Energy Engineering ("Overview of Reservoir Release Improvements at 20 TVA Dams," Vol. 125, April 1999. pp. 1-17) presents data on dissolved oxygen concentration from streams below 20 dams in the Tennessee Valley Authority system. The sample mean from the observations is = 3.294 and the sample standard deviation is s = 2.125. Assume population is approximately normally distributed. Round your answers to 2 decimal places. (a) Calculate the 95% two-sided confidence interval on the mean oxygen concentration. | SUSI (b) Calculate the 95% two-sided prediction interval on the dissolved oxygen concentration for the next stream that will be tested. ≤Xn+1 ≤ (c) Find an interval that will contain 95% of the values of the dissolved oxygen concentration with 99% confidence. i
1.1 The daily sales of an airtime vendor over a period of one month are summarised as follows: Statistics sales Valid 30 Missing Mean 31.4000 Std. Deviation 1.71778E1 Minimum 9.00 Maximum 86.00 18.5000 28.0000 Percentiles 25 50 39.0000| 75 10 an 40 Shd De 17e (a) Briefly describe the distribution of the daily sales (shape, center and spread). (b) For this data, would you use the mean or the median as a measure of central tendency? Explain your answer. (c) Find the range of daily sales. 000 2000 40 00 100 00 sales (d) Construct a boxplot of the daily sales. Hence, comment on the nature of skewness exhibited by the data. kouanba
To determine if their 1.33 centimeter galvanized pipes are properly adjusted, Fogarty Manufacturing has decided to use an X-Chart which uses the range to estimate the variability in the sample. Answer How to enter your answe Step 1 of 7: What is the Center Line of the control chart? Round your answer to three decimal places. THWNHO Va 10 Period obs1 obs2 obs3 obs4 obs5 Sample Mean Sample Range 1 1.34 1.29 1.35 1.33 1.35 1.3320 2 1.35 1.35 1.29 1.38 1.28 1.3300 3 1.3360 4 1.30 1.3340 5 1.34 1.35 1.32 1.33 1.34 1.36 1.29 1.37 1.35 1.29 1.31 1.33 1.32 1.31 1.32 1.34 1.38 1.3260 1.38 1.34 1.33 1.31 1.31 1.31 1,29 1.3180 1.3300 1.35 1.33 1.30 1.35 1.32 1.3300 1.34 1.3440 1.37 1.3080 1.35 1.37 1.28 1.36 1.37 1,29 1.30 1.28 1.30 1.32 1.29 1.36 1.38 1.3400 1.36 1.32 1.31 1.30 1.35 1.3280 1.29 1.37 1.35 1.32 1.32 1.35 1.35 1.34 1.32 1.34 1.32 1.36 1.29 1.32 1:35 1.3300 1.3400 1.3280 11 12 13 Table 14 Control Chart 15 Copy Table Average Values The average of the selected cell(s) is 1.340. Copy…
Please use the accompanying Excel data set or accompanying Text file data set when completing the following exercise. An article in Wood Science and Technology, "Creep in Chipboard, Part 3: Initial Assessment of the Influence of Moisture Content and Level of Stressing on Rate of Creep and Time to Failure" (1981, Vol. 15, pp. 125-144) studied the deflection (mm) of particleboard from stress levels of relative humidity. Assume that the two variables are related according to the simple linear regression model. The data are shown below x = Stress level (%) 54 54 61 61 68 68 75 75 75 y = Deflection (mm) 16.473 18.693 14.305 15.121 13.505 11.64 11.168 12.534 11.224 a. Calculate the least square estimates of the intercept (a) and slope (b). What is the estimate of o² (c)? b. Find the estimate of the mean deflection if the stress level can be limited to 66% (d). c. Estimate the change in the mean deflection associated with a 8% increment in stress level (e). (a) i (Round your answer to 2…
3. What percentage of College students have made at least one online purchase in the last three months? To answer this question, a market researcher surveyed 200 college students. Of those surveyed, 76 said that they had made at least one online purchase (a.) What is the parameter of interest in this study? (b.) Calculate the corresponding point estimate of the population proport
1. The data in Table 7–6 were collected in a clinical trial to evaluate a new compound designed to improve wound healing in trauma patients. The new compound was com- pared against a placebo. After treatment for 5 days with the new compound or placebo, the extent of wound healing was measured. Is there a difference in the extent of wound healing between the treatments? (Hint: Are treatment and the percent wound healing independent?) Run the appropriate test at a 5% level of significance. Use the data in Problem 1. Pool the data across the treatments into one sample of size n = 250. Use the pooled data to test whether the distribution of the percent wound healing is approximately normal. Specifically, use the following distribution 30%, 40%, 20%, and 10% and a = 0.05 to run the appropriate test. Percent Wound Healing Treatment 0-25% 26-50% 51-75% 76-100% New compound (n=125) 15 37 32 41 Placebo (n=125) 36 45 34 10
To determine if their 1.33 centimeter galvanized pipes are properly adjusted, Fogarty Manufacturing has decided to use an X-Chart which uses the range to estimate the variability in the sample. Answer Step 5 of 7: Use the following sample data, taken from the next time period, to determine if the process is "In Control" or "Out of Control". Observations: 1.41, 1.37, 1.34, 1.4, 1.39 Sample Mean: 1.382 ©2024 Hawkes Learning WN 45678 15 Table 9 10 11 12 13 Period obs1 obs2 1 2 1.3340 1.3260 obs3 obs4 obs5 Sample Mean Sample Range 1.34 1.29 1.35 1.33 1.35 1.3320 1.35 1.35 1.29 1.38 1.28 1.3300 3 1.34 1.35 1.32 1.33 1.34 1.3360 1.36 1.29 1.37 1.35 1.30 1.29 1.31 1.33 1.32 1.38 1.31 1.32 1.31 1.31 1.34 1.3180 1.34 1.38 1.31 1.29 1.33 1.35 1.33 1.30 1.35 1.32 1.34 1.37 1.28 1.36 1.37 1.37 1.29 1.30 1.28 1.30 1.35 1.32 1.29 1.36 1.38 1.36 1.32 1.31 1.29 1.37 1.3300 1.3300 1.3440 1.3080 1.3400 1.30 1.35 1.3280 1.35 1.32 1.3300 14 1.35 1.35 1.34 1.32 1.3400 1.32 1.36 1.29 1.32 1.3280 Control…

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