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A certain polymer is used for evacuation systems for aircraft. It is important that the polymer...

A certain polymer is used for evacuation systems for aircraft. It is important that the polymer be resistant to the aging process. Twenty specimens of the polymer were used in an experiment. Ten were assigned randomly to be exposed to an accelerated batch aging process that involved exposure to high temperatures for 10 days. Measurements of tensile strength of the specimens were made, and the tensile strengths in psi were recorded in the accompanying table. Complete parts (a) through (d) below.

No aging : 225 224 220 219 221 220 218 223 222 227

Aging : 213 217 211 215 204 220 209 207 203 205

math   Statistics-And-Probability   
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Diff(X- M) Diff(X, M)2 Treatment 1 (0 225 224 220 219 221 220 218 223 3.1e 2.18 2.90 -0.98 1.90 3.98 1.10 0.10 5.18 9.61 4.41 3.61 8.41 8.81 3.61 15.21 1.21 e.01 26.91 227 M: 221.90 S5: 72.90 Diff(X- M) Diff(X-M) Treatment 2 (X0 213 217 211 215 294 220 299 207 293 285 6.76 43.S6 8.36 21.16 40.96 92.16 1.96 11.56 54.76 29.16 2.68 6.60 4.60 -6.48 9.60 1.48 3,40 7.48 5,40 M: 210.48 SS: 302.40 Significance Level: 0.01 .05 0.10 Treatment 1 One-tailed or two-tailed hypothesis?: One-talled Two-tailed M: 221.9 5S: 72.9 1SS/N-1)-72.9/10-1)-8.1 Treatment 2 N2: 10 of2 N-1-10-1-9 M2: 210.4 552: 302.4 s22-ss2/(N-1 )#3024/(10-1)#33.6 22)(9/18) 8.1)+ (18) 33.6) 20.85 s2W s2gfN1-20.85/10-208 s24° s2pN2 : 20.85/10-2.08 5.63 The [value is 5.63157. The ρ-value is .000024. The result is significant at ρ < .05.

ts = 5.6316

P-value = 0.000024

we reject the null hypothesis

there is significant difference

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