The tensile strength of a metal is a measure of its ability to resist tearing when it is pulled lengthwise. To see if a new experimental method of treating steel bars improves tensile strength, random samples of bars treated using the experimental method and treated using the old method are taken and the tensile strengths are measured and recorded (in newtons per square millimeter). Assume both populations are approximately normally distributed. At significance level a=.05, does the experimental treatment method increase mean tensile strength? Experimental Method: 362 382 368 398 381 391 400 410 396 411 385 385 385 Old Method: 363 355 305 350 340 373 311 348 338 315 1.) State the hypotheses. Enter =, , or "not equal" for : - 1: - 2.) Test Statistic = = (Round to two decimal places) 3.) P-value = (Round to four decimal places) ession ents g 4.) State the decision about the null hypothesis. (Type Reject or Fail to Reject in the answer box.) 43 5.) There sufficient evidence that the experimental treatment method increase mean tensile strength. (Type is or isn't into the answer box)