A bank has two different customer lines, A and B. Callers dial a single number with 444. Customer service, callers randomly to one of these two lines It directs. In these lines, there is a difference between the lengths of the customers' conversations after connecting to the operator. It is desired to be determined. Random samples of two lines were selected and the following data were obtained. (?? = the last three digits of your student number. If all the last three digits are zero, choose as a three-digit number) A LİNE B LİNE Sample Size ?1 = 200 ?2=176 Sample Average (seconds) 216 195 Sample Standard Deviation 35.10 37.80 a.Using the sample statistics, estimate the difference of the two mainstreams within the 95% confidence interval. b.Hypothesis about the claim that the talk times are longer in line A. Perform all the stages of the hypothesis test and test it at 7% significance level.
4.A bank has two different customer lines, A and B. Callers dial a single number with 444. Customer service, callers randomly to one of these two lines It directs. In these lines, there is a difference between the lengths of the customers' conversations after connecting to the operator. It is desired to be determined. Random samples of two lines were selected and the following data were obtained. (?? = the last three digits of your student number. If all the last three digits are zero, choose as a three-digit number)
A LİNE B LİNE
Sample Average (seconds) 216 195
Sample Standard Deviation 35.10 37.80
a.Using the sample statistics, estimate the difference of the two mainstreams within the 95% confidence interval.
b.Hypothesis about the claim that the talk times are longer in line A. Perform all the stages of the hypothesis test and test it at 7% significance level.
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