19. [IS Points] I DETAILS I DEVORESTAT99.5.062. I MY NOTES The deterioration of many municipal pipeline networks across the country is a growing concern. One technology proposed for pipeline rehabilitation uses a flexible liner threaded through existing pipe. An article reported the following data on tensile strength (psi) of liner specimens both when a certain fusion process was used and when this process was not used. No fusion 2758 2710 2665 2812 2521 3149 3257 3223 3220 2743 m = 10 i = 2905.8 51 = 275.6 Fused 3037 3366 3349 3297 3135 2900 2899 2902 n = s i: 3110.6 52 = 205.4 Does the data suggest that the standard deviation of the strength distribution for fused specimens is smaller than that for not-fused specimens? Carry out a test at signicance level 0.01. State the relevant hypotheses. (Use 01 for the non-fused specimens and 02 for fused specimens.) 0 Ho: 0'1 = 02 Ha: 0'1 5 02 O Ho: \"1 = :72 Ha: 01 t 72 O Ho: o'1 = (72 Ha: 01 > (72 O Ho: 0'1 = 0'2 Ha: 0'1 0.100 O 0.050