Question

Suppose the mean willime for a telephone ervation agent at a large inconds. A manager with the intes concerned that business my best to to customers having to walk too long for an agent To address this concem the manage develops new line servion policies that are intended to reduce the of time an ageri needs to spend with each customer Aandom sample of 250 calon suplemen wal-time of 424 seconds with a stand die of 43 seconds Using 005 bevel of significance do you believe the new policies wwe effective in reducing wat mee you think the results have any pctical significance? Determine the wall and alternative hypotheses Ho HA 43 seconds 43 seconds Calculate the test Round to two mal places as needed Colours the value Pva Round to the decimal places needed Dose your answers o Type here to sh

Answer 1

no 250 7 = 424 S4.3 M = 43 o=0:05 The hull and alternative hypothesie are? HoiH = 43 Hair<43 (Left tailed test) Test statistic - X-M-42.4-43 -2.21 ta slin 4.3/5250 t 2.2) ef= -n-1-250-1= 249 P-value=P(tattest) =P(+<-221) fusing t-table) Pavalue = 10.olu <2) option - / Reject Ho because the P-value is less than the 2=0.05 level of significance Conclusion - There is sufficient evidence at the a= 0.05 level of significance to Conclude that the new policies were effective Olotion D No, because while there is significant evidence that shows the new policies were effective ... Considered important (P-value