A fast food outlet claims that the mean waiting time in line is less than 3.5 minutes. A random sample of 60 customers has a mean of 3.6 minutes with a population standard deviation of 0.6 minute. Using a significance level of 0.05, test the fast food outlet's claim
The critical value table is
Level of significance | Critical value of test is Zc(for left-tailed) |
0.01 | -2.33 |
0.05 | -1.64 |
0.10 | -1.28 |
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