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Open the applet Sampling Distributions. On the pull-down menu to the right of the top graph, select Binary. Run the applet for the sample size and the number of samples . Observe the shape of the graph of the sample proportions and record the mean, median, and standard deviation of the sample proportions.
A retailer is looking to evaluate its customer service. Management has determined that if the retailer wants to stay competitive, then it will have to have at least a satisfaction rate among its customers. Management will take corrective actions if the satisfaction rate falls below . A survey of 1,200 customers showed that 1,068 were satisfied with their customer service.
d. Interpret the results at .
When basketball star Michael Jordan graduated as one of a small number of geography majors from college, the average starting salary for a geography major soared by several hundred thousand dollars. In a situation like this, where a small amount of data greatly inflates the average, it is better to use which measure of central tendency? a. Mean. b. Median. c. Range. d. Standard deviation. e. Variation.