EBK NUMERICAL METHODS FOR ENGINEERS
7th Edition
ISBN: 9780100254145
Author: Chapra
Publisher: YUZU
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Textbook Question
Chapter 19, Problem 16P
Use the Excel Data Analysis Toolpack to fit a straight line to the following data. Determine the 90% confidence interval for the intercept. If it encompasses zero, redo the regression, but with the intercept forced to be zero (this is an option on the Regression dialogue box).
| x | 2 | 4 | 6 | 8 | 10 | 12 | 14 |
| y | 6.5 | 7 | 13 | 17.8 | 19 | 25.8 | 26.9 |
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Question 2
Use the least square regression to fit the data in the following
table to the equation yfit = ae*.
1.5 2
y 1.6 3.7 7 13.5 24.6
1
2.5
(A) Determine the values of a and 3.
(B) What is the standard error of this estimation?
(C) Using the fit equation, what
the value of y at r = 2.25?
إضافة ملف
As an industrial engineer, you intend to use linear trend (or linear regression) method to solve a forecasting problem. You have decided to use the equation of y = m(x) + c to establish the relationship between the sales (y) and the related month (x). It is known that 8 consecutive months data (Jan to Aug) were used and they resulted to the following parameter values of m = 320 and c = 1017. Using the regression technique, estimate the percentage of sales improvement from December this year to June next year.
The following data have the form of exponential function y = a*Exp(x), where Exp(x) denotes the
exponential operation of x.
Find the nearest regression equation. In the answer, 1.00e0.5x represents 1.00*e^0.5x =
1.00*Exp(0.5x)
Y: 0.4, 1, 4, 36
X: 0.2, 2, 4, 8
y = 1.00e0.06x
All solutions are not correct
O y = 0.35e0.58x
O y = 1.35e1.5x
Chapter 19 Solutions
EBK NUMERICAL METHODS FOR ENGINEERS
Ch. 19 - The average values of a function can be determined...Ch. 19 - The solar radiation for Tucson, Arizona, has been...Ch. 19 - 19.3 The pH in a reactor varies sinusoidally over...Ch. 19 - 19.4 Use a continuous Fourier series to...Ch. 19 - 19.5 Use a continuous Fourier series to...Ch. 19 - Construct amplitude and phase line spectra for...Ch. 19 - 19.7 Construct amplitude and phase line spectra...Ch. 19 - 19.8 A half-wave rectifier can be characterized...Ch. 19 - 19.9 Construct amplitude and phase line spectra...Ch. 19 - Develop a user-friendly program for the DFT based...
Ch. 19 - 19.11 Use the program from Prob. 19.10 to compute...Ch. 19 - 19.12 Develop a user-friendly program for the FFT...Ch. 19 - 19.13 Repeat Prob. 19.11 using the software you...Ch. 19 - An object is suspended in a wind tunnel and the...Ch. 19 - 19.15 Use the Excel Data Analysis ToolPak to...Ch. 19 - Use the Excel Data Analysis Toolpack to fit a...Ch. 19 - (a) Use MATLAB to fit a cubic spline to the...Ch. 19 - 19.18 Use MATLAB to generate 64 points from the...Ch. 19 - In a fashion similar to Sec. 19.8.2, use MATLAB to...Ch. 19 - Runges function is written as f(x)=11+25x2...Ch. 19 - A dye is injected into the circulating blood...Ch. 19 - In electric circuits, it is common to see current...Ch. 19 - Develop a plot of the following data with (a)...
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