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Please be neat and clear so that I can follow through. Thank You and thumps up. A sample of N The sample mean was found to be 36.2 ksi and the sample standard deviation was found to be 2.4 ksi. 4. 15 steel tensile specimens were taken and the yield strength of each measured Calculate a prediction interval, at 95 % confidence, for the yield strength value of the next sample. Calculate a 95 % confidence interval for the true population standard deviation. A. B.

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е.edichba dnt u vd (liar,a+2 ) :) fr. (36.2ナ2-4(1.go) er -(3.2-404, 3.2 + *o) (31,49€, 40,904) , toes 2-14 2 cr= (34.2± 2:tus (2.4) (3.2 1319,3(.2+ 1.329) CJ : ( 34.371,34-529)

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