Geico Insurance Company conducted a survey to determine the average amount of time their customers spend waiting on hold when calling to speak to a customer service representative. Based on a simple random sample, they surveyed 58 customers. The statistics showed that customers spent an average of 7.86 minutes on hold, with a variance of 32.6. Calculate the standard error of the mean. Report your answer to 4 decimal places, using conventional rounding rules.
Solution :
Given that,
mean = = 7.86 minutes.
variance = 2 = 32.6 minutes.
standard deviation = = 2 = 32.6 = 5.7096 minutes.
n = 58
= = 7.86 minutes.
= / n = 5.7096 / 58 = 0.7497
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