A bank is studying the average time that it takes 6 of its tellers to serve a customer. Customers line up in the queue and are served by the next available teller. Based on service time for the last 140 customers, the following ANOVA result is obtained. Source DF SS MS F P-value Teller 5 3315.32 663.064 1.508 0.1914 Error 134 58919.1 439.695 Total 139 62234.4 A bank branch manager wondered if the average service times among the tellers are different.
1. What is the null hypothesis?
a. μ1=μ2=...=μ6
b. At least two of the means are different2. At the 10% significance level,
a. We reject the null hypothesis
b. We cannot reject the null hypothesis

(co 3) the times that customers spend in a book store are normally distributed with a mean of 39.5 minutes and a standard deviation of 9.4 minutes. a random sample of 25 customers has a mean of 36.1 minutes or less. would this outcome be considered unusual, so that the store should reconsider its displays? no, the probability of this outcome at 0.035, would be considered usual, so there is no problem yes, the probability of this outcome at 0.035, would be considered unusual, so the display should be redone no the probability of this outcome at 0.359 would be considered usual, so there is no problem yes, the probability of this outcome at 0.965 would be considered unusual, so the display should be redone