CHE223H1 Midterm: CHE223_2010_ts_1281466223
Document Summary
Procedure for mark revisions: you have up to one week after the marked test has been handed back to request revisions. To do so, attach a note with the details and reasons for your request on your copy and hand it back to me in class. Q. 1) (40%) to meet safety regulations, the tensile strength of bungee tube tow ropes must exceed 4150 lbf. A random sample of 20 ropes from a particular manufacturer is tested. The mean tensile strength of the sample is 4290 lbf and the standard deviation of the sample is 430 lbf. State any assumption about the underlying distribution of the data. The parameter of interest is the mean tensile strength, . 4290 t0 =1. 46 and =20-1=19 d. f. p tp. +140 lbf, is the sample size n=20 adequate to ensure that the null hypothesis ho: = 4150 lbf will be rejected with a probability of at least 90%.
