1. Engineering
  2. Mechanical Engineering
  3. hi i posted these questions last night but no answered...

Question: hi i posted these questions last night but no answered...

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1. (7 points) Consider the two samples x, and y in the table below, each with N 40 data points (also available in xlsx and mat formats on webcourses). For each sample, compute the mean, variance, standard deviation, geometric mean, range, skewness, and kurtosis. Is the sample Gaussian? Plot a histogram to check and give your interpretation. Note: Different programs may use different equations for these terms, so please indicate your calculation method (e.g. notes from class, Excel, Matlab, etc.) i17-24 i 25-32 i 33-40 i 9-16 Xi i 1-8 ox Vi xi 2.409 7.018 2.247 7.198 1049 1.159 1614 2.656 3.217 23.421 2.058 4.389 0.934 0.756 2.325 6.026 2.133 6.767 1.611 3.461 2.016 5.210 2.803 15.665 2.515 8.733 1.429 2143 3.007 10.629 1.87114031 2.2891-7.871 50-1-7.890-11.2 72T-1.676ェ2.377 2.384-9.150 3.362 7.135 1.49111.902 1.656-2.641-11.431-_1726 1.596 2.310 1.537 2409 2.319 7.691 1.404 1816 2058 5866 2.246 6.491 1846 4.17 1.314 1.505 0455 0.161 1.7143.667 2.425 9.163 2.763 11.237 2.209 7.378 2.329 7.264 2486 8.369 6.911 (7 points) The two samples x and y, above were taken from an experiment that exhibited a quartic relationship with a quadratic term. Use the fit model 2.

2. (7 points) The two samples x and y above were taken from an experiment that exhibited a quartic relationship with a quadratic term. Use the fit model to compute an estimate of a and b using least squares Hints: Define the error as so the sum of the squared error is and simultaneously minimize the sum J with respect to a and b. Recall constants can be factored out of sums and that CA-B)C)CaC)-(BC) 1-1

factored out of sums and that (CA - B)c)-(AC) - (BC) i-1 i-1 i-1 3. (6 points) Consider a sample of beams with rectangular cross section. The widths are measured and found to have a mean b and uncertainty u 0.02b; another way of saying it is the sample of beams have a width of b 0.02b. The thickneses are measured and have a mean h and uncertainty u-0.03h. Compute the uncertainty in the corresponding beam cross sectional area A and moment of inertia I, that is, compute u4 and u Page 1/1

hi,
I posted these questions last night but no answered them ???
I got a respond saying that need more info!!! that's everything I got.
thx

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