Question

12) rind the critical value and rejection region for the type of t-test with level of sign nance anu sa pe le n. z) Left-tailed test, a 0.01, n-36 A) to =-2.438; t <-2.438 C) to 1.306; t -1.306 B) to D) to 2.434; t <-2.434 2.438; t>2.438 Objective: (7.3) Find Critical Values in a t-distribution 13) A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1400 hours. A homeowner 13)- selects 25 bulbs and finds the mean lifetime to be 1390 hours with a standard deviation of 80 hours. Test the manufacturer's claim using critical values and rejection regions. Use ? = 0.05. Objective: (7.3) Test a Claim About a Mean Test Statistic: ' Critical Value(s): Decision ? Rejection Region

Answer 1

lassmate Date Page Given 4oo houns 1390 desb stabish's x-시 -1 390-1400 critical-Vulu も지 C幻 Kzgim is ch'on Regim 2. 064 2.o