6.70EVAPORATION FROM SWIMMING POOLS. Refer to the Heating/Piping/AirConditioning Engineering (April 2013) study of evaporation from occupiedswimming pools, Exercise 6.340. The researchers desired an estimate of themean absolute value of the deviation between the actual and estimatedevaporation level (recorded as a percentage). Using a small sample, theresearchers obtained the following summary statistics for absolute deviationpercentage i = 18%, s = 20%. How many swimming pools must be sampled toestimate the true mean absolute deviation percentage to within 5% using a 90%confidence interval?

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Answered: EVAPORATION FROM SWIMMING POOLS. Refer…

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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Consider the following data and answer the following questions. Monthly Sales (OMR): 25,000 30,000 35,000 45,000 40,000 50,000 20,000 What is the Inter Quartile Range of sales? What is the Quartile Deviation of sales? What is the coefficient of Quartile Deviation of weekly sales?
In a study on running and happiness, runners indicated the number of miles they ran in a day and their subsequent score on a Happiness Survey (higher score = greater happiness). Runner # of miles (x) Happiness Score (y) 1 16 12 2 4 3 12 14 4 2 8 For these data: The mean of miles run is: 8.50 The mean of the Happiness scores is: 10.00 The standard deviation of the Miles scores is: 5.72 The standard deviation of the Happiness scores is: 3.16 In your submission, please include a copy of the SPSS or Excel output and answer the following: A. What is the r and r? value? B. Based on Pearson's r and r2 value, describe the relationship (direction/strength) that exists between # of miles run and Happiness scores. C. Create a scatterplot for the data using Excel or SPSS (include output in your submission). D. Insert the prediction line from Excel/SPSS on your scatterplot.
For a study of two independent samples: Sample 1: mean = 18.1, standard deviation = 2.5, sample size = 30; Sample 2: mean = 19, standard deviation = 2.0; sample size : 54. = a. Calculate t-obtained ONLY (do not interpret). a. How many degrees of freedom are there?
sisin, 2 Calculate Quartile Deviation and its Coefficient from the following data : Weight (in pounds) 140 150 160 120 122 124 126 130 No, of Students 1 1 3. 10 Solutian
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The frequency distribution of scale categories for a 7-point off- flavor scale follows: Category Frequency 1 (none) 75 86 3 93 4 74 5 60 6 36 7 (very strong) 21 1. What is the rational origin of the foregoing 7-point scale? 2. Scale the categories using Guilford's method and interpret the results. Also find Guilford's adjusted scores. Detemine the mean and the standard deviation of the estimated category scale. 3.
Choose the appropriate statistical test. When computing, be sure to round each answer as indicated. A dentist wonders if depression affects ratings of tooth pain. In the general population, using a scale of 1-10 with higher values indicating more pain, the average pain rating for patients with toothaches is 6.8. A sample of 30 patients that show high levels of depression have an average pain rating of 7.1 (variance 0.8). What should the dentist determine? 1. Calculate the estimated standard error. (round to 3 decimals). [st.error] 2. What is thet-obtained? (round to 3 decimals). 3. What is the t-cv? (exact value) 4. What is your conclusion? Only type "Reject" or Retain"
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