- 1 Two Manufacturers Of Quartz Watches Romex And Tirrot Were Tested For Durability The Number Of Days To Failure For 1 (112.4 KiB) Viewed 20 times
1. Two manufacturers of quartz watches (Romex and Tirrot) were tested for durability. The number of days to failure for
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1. Two manufacturers of quartz watches (Romex and Tirrot) were tested for durability. The number of days to failure for
1. Two manufacturers of quartz watches (Romex and Tirrot) were tested for durability. The number of days to failure for a sample of size 5 of both makes is given below: Romex 101.4 91.3 108.0 104.8 102.2 Tirrot 118.7 102.5 99.4 129.1 110.1 (a) Compute the sample mean and sample variance of Romex and Tirrot watches from the samples given. (b) Let uix denote the population mean durability of Romex watches, and let my denote the population mean durability of Tirrot watches. Test the following hypotheses. Ho: Mx = MY = H1 :ux < MY You may assume that both samples come from populations which have equal variances. State any assump- tions made, find the p-value of the test an draw your conclusion with a = 0.05. 2
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