Question

An experiment to compare the tension bond strength of polymer latex modified mortar (Portland cement mortar to which polymer latex emulsions have been added during mixing) to that of unmodified mortar resulted in 3 = 18.14 kgf/cm2 for the modified mortar (m = 42) and y = 16.34 kgf/cm2 for the unmodified mortar (n = 32). Let u, and uz be the true average tension bond strengths for the modified and unmodified mortars, respectively. Assume that the bond strength distributions are both normal. (a) Assuming that 01 = 1.6 and 2 = 1.3, test Ho: 41 - U2 = 0 versus H: 4, - uz > 0 at level 0.01. Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) Z = 3.8542 P-value = 0.0002 x

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Answer 1

At qalita/g=:8.7195 ANEWER given test -static 2= 3.8542 2=ool P-value Gright tailed) =P [2>3.8542] 0-000058 (som 2-lable 0.0001 Here let samele 1 fiberglass soia Gamele & Commercial Cosbon grid Given - hi=96 i = 3944 $i =8 12-26 sła = 111.8 5a = 4.4 S.EE sa of = + (4.439 0-9561 26 SO 32 dif 0.83582 + Ocxpol too2018 0-00 115 hal ha-1 = 35-825 = 36 CS Scanned with CamScanner

At 997 itd=2.4345 The aar. C. I por Mi-la as Gü-T ) lag SD)= (394-141-8) # 9.1195x5 2561 -9419.60 lower bound -94-9.60 E -12.00 verex band -91-2.60 -6.80 The 997 verer bond is (arxa) I EL SE (32.4-141-8) X 2.44345x 0.9561 A 933-9.4 +2:33 Vreer bound = -9.4 +2:33 = 203 lower bound = -9.4 -233 =-11:33 CS Scanned with CamScanner