4. An article in the Journal of Environmental Engineering (1989,Vol. 115(3), pp. 608-619) reported the results of a study on theoccurrence of sodium and chloride in surface streams in centralRhode Island. The following data are chloride concentration y (inmilligrams per liter) and roadway area in the watershed x (inpercentage).y4.46.69.710.610.810.90.190.150.570.700.670.63y11.812.114.314.715.017.30.470.700.600.780.810.78y19.223.127.427.731.839.50.691.301.051.061.741.624.1. Draw a scatter diagram of the data. Does a simple linearregression model seem appropriate here?4.2. Fit the simple linear regression model using the method ofleast squares.

Steps to construct scatter plot in Excel: Enter the data for x and y in Excel sheet>Select the…

Answered: 4. An article in the 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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The following are the weight (in grams) and quantity of volatile emissions (in hundreds of nanograms) for plants. A scatterplot of the data is given to the right. 30- 20 10- 180 Weight (x) 58 86 58 64 50 67 63 78 78 78 53 Quantity (y) 8.5 21.5 10.5 23.0 12.5 11.5 8.0 13.0 16.5 21.0 a. Obtain the linear correlation coefficient. b. Interpret the value of r in terms of the linear relationship between the two variables. c. Discuss the graphical interpretation of the value of r. d. Obtain the value of the coefficient of determination by squaring r. 40 60 80 100 Q
5. Calculate the net reproduction rate from the following data : Age group of No. of female child-bearing females No. of survivors out of each 1,000 female children Age group of No. of female child-bearing children born females No. of survivors out of each 1,000 female children children born to 1,000 to 1,000 women women oub passing through each age group passing through each age group da15-20 50 850 35-40 300 650 20-25 180 800 40-45 100 600 25-30 450 750 45-50 40 500 30-35 500 700
Q.No.2 You are working for the transport manager of a "call centre" which hires cars for the staff. You are interested in the weekly distance covered by these cars. Kilometers recorded for a sample of hired cars during a given week yielded the following data: (8) k.m. covered 80-90 90-100 100-110 110-120 120-130 130-140 140-150 150-160 160-170 No. Of cars (f) 18 2 12 28 45 32 20 2 16 (a) Calculate the median, mode, third decile (D3) and P77. (b) Draw a cumulative frequency polygon (ogive) on graph paper (only) and estimate graphically the number of cars which covered less than 140 k.m in the week. Ancu er
i. The data below shows the maximum temperature (C) and the number of bowls of soup sold at God's Grace Canteen on eleven randomly selected days last year. Day 1 2 3 4 5 6 7 8 9 10 11 Temp. (CC) 32 36 22 29 25 18 11 16 5 2 Bowls Sold 2 2 10 10 | 20 35 45 50 50 57 63 On graph paper, draw a scatter plot of temperature against bowls sold to represent the data using a scale of 1 cm to represent 5 bowls and 2cm to represent 5°C. ii. Write down the type of relationship between the variables. iii. Calculate the mean number of bowls of soup, x, sold. Find the mean maximum temperature, y of soup recorded. 1v. Plot and label the point M (x, ỹ ) on your graph. V. V1. The line of best fit for the data passes through the point M and the y-intercept (0, 33.2). Draw this line on your graph. vii. Find the equation of the line of best fit. viii. On another day of the year, the temperature was 20°C. Using the equation of the line of best fit, estimate the number of bowls of soup sold on that day. 1X.…
As the owner of a business, Karen needs fire insurance. Her building is worth $724,000 and the contents are valued at $677,000. Her agent placed the building in structural classification B and area rating 2. Use Table 19-4 to calculate her total premium. Round your answer to the nearest cent.
The data in the following table relate grams plant dry weight (Y) to percent soil organic matter (X1) and kilograms of supplemental soil nitrogen added per 1000 square meters (X2). X1 X2 78.5 7 2.6 74.3 1 2.9 104.3 | 11 5.6 87.6 11 3.1 95.9 7 5.2 109.2 11 102.7 | 3 5.5 7.1 Define Y, X, В, е. 1
6. From the data given below calculate the gross reproduction rate and net reproduction rate : Age group No. of children born to 1,000 women passing through the age group Mortality rate 16-20 150 120 dmun ert ter 180 guoiri basag 150 200 21-25 1,500 26-30 2,000 31-35 800 36-40 500 220 41-45 200 230 46-50 100 250 Sex ratio being males : females 52 : 48.
1. Report the answer with the correct number of significant figures: a b C d e |f 6.0 g Ih li lj 1.4 +2.35 = 7.635 +2.34 = 13.627 -1 = 11.681 3.2 = 14.40 +2.6 - 7.211 = 13.60*3= |27.1*3.47 = 69.3 / 2.467 = 47.321/5.7 = 72.367/8.34 * 2.1 =

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