2. Fit a straight line to the following data and estimate the production in the year1957.FIG. 01YEAR:19511961197119811991Productionin1012081013theThousandtons:Hint: take the deviations of X = x-x and Y = y-y at Y a + bXA. The production in the year 1957? *O 10 tonsO 10.04 tonsO10.1 tons10.08 tonsb. the equation for the fitted straight line?O y = -68.24 + 0.04xO y = -68.24 + 0.08x) y = -88.24 + 0.04xBolamn3

Calculate Fitting a straight line - Curve fitting using Least square method X Y 1951 10 1961…

Answered: 2. Fit a straight line to the following…

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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Suppose a researcher collects data on the bacterial contamination, measured in colony-forming unit per milliliter, for both upstream and downstream sections of 35 rivers. The data is plotted with upstream bacterial contamination on the horizontal axis and downstream bacterial contamination on the vertical axis. The Scioto River is an outlier in the ?y‑direction. What must be true about this river? The upstream bacterial contamination for this river is much higher or lower than the rest of the rivers in the data set. The downstream bacterial contamination for this river is much higher or lower than other rivers in the data set that have similar upstream bacterial contamination. This river is an influential observation. The downstream bacterial contamination for this river is much higher or much lower than the rest of the rivers in the data set. The absolute value of the residual of this river is large.
please answer question 2
4. Summary statistics for the data are shown in the table below. Меan Standard Deviation Iland, x 17.682 1.168 Foot, y 23.318 1.230 Pearson correlation r 0.948 (a) Find the slope by using the formula (b) Find the y-intercept by using the formula a = y – br (c) Find the regresssion equation, using the words "IHand" and "Foot," not r and y. (d) Using the regression equation, predict the foot length (in em) for someone who has a hand length of 18 cm.
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(c) Are your estimates in parts (a) and (b) upper and lower estimates? Ex- plain. (A) (b) is a lower estimate and (a) is an upper estimate since v is a decreasing function of t. (B) (a) is a lower estimate and (b) is an upper estimate since v is an increasing function of t. (C) (a) and (b) are neither lower nor upper estimates since v is neither an increasing nor decreasing function of t. (d) Let's find an overestimate and underestimate of the distance traveled by the motorcycle during this time period.
C) If Ariel converted her variables into standard deviation units and then computed her regression equation, what would her slope and intercept be?
Calculate the coefficient of variation between X and Y from the following data: 3 4. 6. Y 9. 10 12 11 13 14 16 重5
A study was conducted to see if there was a linear relationship between the length in cm of seals in overhead photographs and their weight in kilograms. Below is the data: 4. Overhead 7.2 7.4 9.8 9.4 8.8 8.4 7.6 length Weight 116 154 250 200 197 194 170 а. If the length of a seal was 8.2 cm, what is its weight? b. Can you calculate the weight of a seal if it is 20 cm long?
For item 1 to 5, referring to Table 3.5. Consider the ff. data set, in which a maker of asphalt shingles is interested in the relationship between sales for a particular year and factors that influence sales. Y- sales(in thou $); X1- promotional accounts; X2- active accounts; X3- competing brands; X4- potential Table 3.5 Y X1 X2 X3 X4 291.9 9 56 10 160 4 42 4 339.4 6.5 73 16 159.6 5.5 60 11 7 86.3 5 44 12 12 237.5 6 50 6 6 107.2 5 39 4 6805 10
e55. Calculate the mode for the following data: Clais interval: 20-24 25-29 30-34 35-39 40-44 45-49 Frequency: 3. 6 5 14 7 8

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2. Fit a straight line to the following data and estimate the production in the year 1957. FIG. 01 YEAR: 1951 1961 1971 1981 1991 Production in 10 12 08 10 13 the Thousand tons: Hint: take the deviations of X = x-x and Y y-y at Y = a + bX