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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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Prehistoric pottery vessels are usually found as sherds (broken pieces) and are carefully reconstructed if enough sherds can be found. An archaeological study provides data relating x = body diameter in centimeters and y = height in centimeters of prehistoric vessels reconstructed from sherds found at a prehistoric site. The following Minitab printout provides an analysis of the data. Predictor Coef SE Coef T PConstant -0.215 2.429 -0.09 0.929Diameter 0.7905 0.1471 5.29 0.003 S = 4.07980 R-Sq = 87.5% a) For the least-squares line ŷ = a + bx, what is the value of the constant a? What is the value of the slope b? (Note: The slope is the coefficient of the predictor variable.) Write the equation of the least-squares line.a = b = ŷ = ______+ ____x b) The P-value for a two-tailed test corresponding to each coefficient is listed under P. The t value corresponding to the coefficient is listed under T. What is…
Data relating to age of the students and their games. Calculate correlation between the age of the students and their playing habits. Age 15 16 17 18 19 20 No. of Students 250 200 150 120 100 80 Regular Players 200 150 90 48 30 12
A teacher is interested to know whether the average number of hours spent by the students in watching educational YouTube videos has a significant relationship with their performance during the final term examination. He surveyed a group of students on his class and tabulated the result. Use 0.05 level of significance. Student Number of Hours (X) Exam Scores (Y) A 4 36 B 2 20 3 21 D 4. 36 E 27 3 25 2 19 H 1 20 5 23 J 4. 45 K 49 40 M 5 26 N 2 40 3 34 ТOTAL X = = What is the value of the slope?
A researcher is conducting an experimental study on the effect of aspirin on heart attack risk. In order to assign who will receive aspirin and who will receive a placebo, she first divides her study into three age groups (18-29, 30-49, and 50 or older). She then randomly assigns individuals within these age groups to either receive aspirin or the placebo. This is an example of a cluster ?
A statistical program is recommended. The owner of a movie theater company would like to predict weekly gross revenue as a function of advertising expenditures. Historical data for a sample of eight weeks follow. Weekly Gross Revenue ($1,000s) 96 = 91 95 92 95 94 94 94 Television Newspaper Advertising Advertising ($1,000s) ($1,000s) 5 2 4 2.5 3 3.5 2.5 3 1.5 2 1.5 2.5 3.2 2.3 4.1 2.5 (a) Use α = 0.01 to test the hypotheses Ho: B₁ = B₂ = 0 Ha: B₁ and/or B₂ is not equal to zero for the model y = Bo + B₁X₁ + B₂x₂ + ε, where X1 = television advertising ($1,000s) x2 newspaper advertising ($1,000s). Find the value of the test statistic. (Round your answer to two decimal places.)
Data on grades of students who did and did not attend class regularly. What are the mean and median scores of those two groups of students? What do they suggest about the value of attending class? Attended class 241 243 246 249 250 252 254 254 255 256 261 262 263 264 264 264 265 267 267 270 271 272 273 276 276 277 278 278 280 281 282 284 288 288 290 291 291 292 293 294 296 296 297 298 310 320 321 328 Skipped class 188 195 195 225 228 232 233 237 239 240 250 256 256 256 261 264 264 268 270 270…
PLEASE ANSWER ALL THE PARTS OF THE QUESTION ( THIS IS NOT A GRADED ASSIGNMENT)
Calculate the value of coefficient of correlation petween price and supply. What is its probable error ? Interpret the value of coefficient of correlation. Price 8. 10 15 17 20 22 24 25 Supply : 25 30 32 35 37 40 42 45
Help please!
Construct a scatter plot from the given points and describe the correlation.
Answer
N=2000 A=1500 B =100 AB=350 TEST THE CONSISTENCY OF DATA

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Help finding Test Statistic and Critical Value given this data Husband (Top row) and Wife (bottom row) Happiness Scores: 50 65 72 18 45 98 77 85 50 82 60 55 60 25 80 80 70 80 70 50