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Using the TI 84 calculator, having trouble getting the P value here:
Suppose the mean? wait-time for a telephone reservation agent at a large airline is 45 seconds. A manager with the airline is concerned that business may be lost due to customers having to wait too long for an agent. To address this? concern, the manager develops new airline reservation policies that are intended to reduce the amount of time an agent needs to spend with each customer. A random sample of 250 customers results in a sample mean? wait-time of 44.4 seconds with a standard deviation of 4.3 seconds. Using α=0.05 level of? significance, do you believe the new policies were effective in reducing wait? time? Do you think the results have any practical? significance?
(a) Need to figure out (With steps on TI 84 would be great):
(b) P-Value=
(c) Reject or not
(d) Do you think the results have any practical significance (yes or no)
(e) There (is or is not) sufficient evidence at theα=0.05 level of significance to conclude that the new policies were effective.
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