3. Sewage and industrial pollutants dumped into a body of watercan reduce the dissolved oxygen concentration and adverselyaffect aquatic species. In one study, weekly readings are takenfrom the same location in a river over a 2-month period.Weeknumber1234Dissolved O₂ppm4.95.16.54.3Weeknumber5678DissolvedO₂ ppm4.74.94.55.1Some scientists think that 5.0 ppm is a dissolved O, level that ismarginal for fish to live Conduct a statistical test to determinewhether the mean dissolved oxygen concentration is less than5.0 ppm. All calculations are at 95% CL

Data ; 4.9,5.1,6.5,4.3,4.7,4.9,4.5,5.1 First calculate mean and and standard deviation : Mean = 5…

Answered: 3. Sewage and industrial pollutants…

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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4. Compute AND interpret the estimated OR for the effect of being currently employed (OCC = 1) controlling for age, smoking, sex, and cholesterol. 1
The Derbyshire village of Eyam, England, suffered an outbreak of bubonic plague in 1665–1666. The source of that plague was believed to be the Great Plague of London. The village is best known for being the "plague village" that chose to iso- late itself when the plague was discovered there in August 1665 rather than let the infection spread. Detailed records were preserved. The initial population of Eyam was 350. In mid-May 1666, nine months after the beginning of the epidemic, there were 254 susceptibles and 7 infectives. The data about the epidemic in the remain- ing months are given in Table 2.2. The infective period of the bubonic plague is 11 days. (a) Estimate a (b) Use the implicit solution of the SIR model to estimate B.
A paper gives data on x = change in Body Mass Index (BMI, in kilograms/meter) and y = change in a measure of depression for patients suffering from depression who participated in a pulmonary rehabilitation program. The table below contains a subset of the data given in the paper and are approximate values read from a scatterplot in the paper. BMI Change (kg/m2) 0.7 0.8 1 1.5 1.2 1 0.4 0.4 0.5 -0.5 0.1 Depression Score Change -1 | 4 5 8 13 14| 17| 18| 12 14 The accompanying computer output is from Minitab. Fitted Line Plot Depression score change = 6.512 + 5.472 BMI change 5.26270 20 - R-Sq R-Sq (adj) 19.88% 27.16% 15- 10-. 5- -0.5 0.0 0.5 1.0 1.5 BMI change 5.26270 27.166 Coefficients Term Coef SE Coef T-Value P-Value VIF Constant 6.512 2.26 2.88 0.0164 BMI change 5.472 2.83 1.93 0.0823 1.00 Regression Equation Depression score change = 6.512 + 5.472 EMI change (a) What percentage of observed variation in depression score change can be explained by the simple linear regression model?…
Review Assignment #6 2021 - AP Statistics, section 4BI WebAssign webassign.net Rapio dentity Repidioantity 9. [-/1 Points] DETAILS YMSSTAT2 12.E.012. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER PTC is a substance that has a strong bitter taste for some people and is tasteless for others. The ability to taste PTC is inherited. About 67% of Italians can taste PTC, for example. You want to estimate the proportion of Americans with at least one Italian grandparent who can taste PTC. Starting with the 67% estimate for Italians, how large a sample must you test in order to estimate the proportion of PTC tasters within + 0.03 with 99% confidence? 10. [-/3 Points] DETAILS YMSSTAT212.E.014. ASK YOUR TEACHER PRACTICE ANOTHER MY NOTES An experiment on the side effects of pain relievers assigned arthritis patients to one of several over-the-counter pain medications. Of the 475 patients who took one brand of pain reliever, 24 suffered some "adverse symptom." Does the experiment provide strong…
5. The electric power consumed each month by a chemical plant to thought to be related to the average ambient temperature x₁, the number of days in the month X2, the average product purity x3, and the tons of product produced x4. The past year's historical data are available and are presented in the following table. y 240 236 270 274 301 316 300 296 267 276 288 261 X₁ 25 31 45 60 65 72 80 84 75 60 50 38 X₂ 24 21 24 25 25 26 25 25 24 25 25 23 X3 91 90 88 87 91 94 87 86 88 91 90 89 X4 100 95 110 88 94 99 97 96 110 105 100 98
10. What is the effect on a for the following scenarios: a. Bis increased b. Bis decreased C. power is increased d. power is decreased
Research was conducted on the amount of oxygen runners could utilize during training, known as their VO2 max, and their finishing times for a 5K race to see if there was a significant relationship between these variables. The results for 8 runners were compiled and placed in the following table. VO2 Max (ml/kg/min) (x) 5K Finishing Time (min) (y) 16.28 34.66 20.55 37.41 18.62 34.11 15.78 37.36 18.12 37.56 39.49 23.7 26.88 28.72 43.39 20.69 Calculate the correlation coefficient. Round to three decimals. Find the equation of the regression line. Round each value to two decimals Preview Predict the time in the 5K for a runner whose VO, max is 30.12 ml/kg/min. Round your answer to two decimals Get Help: VIDEO
10. A group of 20 endangered deer were moved to an island for their protection. The table on the right shows their population trend over the years. Based on the info provided, the best estimate for the carrying capacity is a. 80 b. 90 c. 105 d. 110 e. 120 Yr 0 Pop 20 1 40 2 80 3 4 120 90 5 6 120 90 7 8 120 90
7.38 Food intake and weight gain. If we increase our food intake, we generally gain weight. Nutrition scientists can calculate the amount of weight gain that would be associated with a given increase in calories. In one study, 16 nonobese adults, aged 25 to 36 years, were fed 1000 calories per day in excess of the calories needed to maintain a stable body weight. The subjects maintained this diet for eight weeks, so they consumed a total of 56,000 extra calories.18 According to theory, 3500 extra calories will translate into a weight gain of 1 pound. Therefore, we expect each of these subjects to gain 56,000/3500 = 16 pounds (lb). Here are the weights before and after the eight-week period, expressed in kilograms (kg): WTGAIN Subject 1 2 3 Weight before 55.7 54.9 59.6 Weight after 4 5 6 7 8 62.3 74.2 75.6 70.7 53.3 61.7 58.8 66.0 66.2 79.0 82.3 74.3 59.3 Subject 9 10 11 12 13 14 15 Weight before 73.3 63.4 68.1 73.7 91.7 55.9 61.7 Weight after 79.1 66.0 73.4 76.9 93.1 63.0 68.2 W wr ore…
The toco toucan, the largest member of the toucan family, possesses the largest beak relative to body size of all birds. This exaggerated feature has received various interpretations, such as being a refined adaptation for feeding. However, the large surface area may also be an important mechanism for radiating heat (and hence cooling the bird) as outdoor temperature increases. Here are data for beak heat loss, as a percent of total body heat loss from all sources, at various temperatures in degrees Celsius. [Note: The numerical values in this problem have been modified for testing purposes.] Temperature (oC)(oC) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Percent heat loss from beak 33 32 33 32 39 43 56 48 44 49 44 56 58 60 60 63 The equation of the least-squares regression line for predicting beak heat loss, as a percent of total body heat loss from all sources, from temperature is: (Use decimal notation. Enter the values of the intercept and slope rounded to two…
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