Suppose the value of Young\'s modulus (GPa) was determined for cast plates consi

Question

Suppose the value of Young's modulus (GPa) was determined for cast plates consisting of certain intermetallic substrates, resulting in the following sample observations: Calculate the deviations from the mean. Use the deviations calculated in part (a) to obtain the sample variance and the sample standard deviation. Calculate s by using the computational formula for the numerator S_xx. Subtract 100 from each observation to obtain a sample of transformed values. Now calculate the sample variance of these transformed values. Calculate the sample variance and standard deviation. If the observations were reexpressed in hours, what would be the resulting values of the sample variance and sample standard deviation?

Explanation / Answer

you have asked two questions, i am giving u soln of second.

2) a) 87 ,105 ,130 ,160 ,180 ,195 ,135 ,145 ,215 ,105 ,145 ,152 ,151 ,138 ,87 ,99 ,94 ,119, 129

Variance and Standard Deviation Calculator

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This standard deviation calculator calculates the standard deviation and variance from a data set. This isn’t your ordinary variance and standard deviation calculator. Type in your numbers and you’ll be given: the variance, thestandard deviation, plus you’ll also be able to see your answer step-by-step below.

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Explanation

B) varience = 1283.56 min^2

to be converted into hours = 1283.56/60 =21.39 hours^2

standard dev = 35.82 / 60 = 0.597 hours

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