Question

The accompanying table contains two samples that were collected as matched pairs. Complete parts a and b below. Click the icon to view the data table. a) Let the parameter of interest be the population mean of matched-pair differences for Sample 1 minus Sample 2. The 90% confidence interval to estimate difference in means between the populations from which Sample 1 and 2 were drawn has a lower limit and an upper limit 0 (Round to two decimal places as needed.) b) What conclusions can be made based on these results? The interval zero, so there enough evidence to conclude that there is a difference in means between the populations from which Sample 1 and 2 were drawn

Answer 1

for 8-1 = 1.89 sall, the 90% confidence interval for the difference in means for sample I minus sampled is at si un while is the critical value for (n-1) af The citical value of tol -1 =7dfis Cuven data is sample a 55 8 11 5 97 Totey Sample 4 67 4 4 96 2 d 5-12 4 7 5oi 13 2² 25 14 16 49 250 121 Now d = id= Id 13 - 1-6250 8 I 10 $ = mal zde (Ed n = 14.2679 The confidence interval is 1.6250 £61-89) 14.2679 7 1.650 £ 2.6983 (-)-0733, 4-3233) Lower limit = -1.0733 Upper Linit = 4.3233

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