Question 1
From time to time, unknown to its employees, the research
department at Post Bank observes various employees for their work
productivity. Recently this department wanted to check whether the
four tellers at a branch of this bank serve, on average, the same
number of customers per hour. The research manager observed each of
the four tellers for a certain number of hours. The Table 1 gives
the number of customer served by the four tellers during each of
the observed hours.
Table 1
Teller A
Teller B
Teller C
19
14
11
21
16
14
26
14
21
24
13
13
18
17
16
13
18
At the 1% significance level, test the null hypothesis that the
mean number of customers served per hour by each of these four
tellers is the same. Assume that all the assumptions required to
apply the one-way ANOVA procedure hold true.
State the appropriate null and alternative hypothesis for the
above test.