This exercise uses the normal probability density function and requires the use of either technology or a table of value

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This Exercise Uses The Normal Probability Density Function And Requires The Use Of Either Technology Or A Table Of Value 1 (217.21 KiB) Viewed 27 times

This exercise uses the normal probability density function and requires the use of either technology or a table of values of the standard normal distribution. The cash operating expenses of the regional phone companies during the first half of 1994 were distributed about a mean of $29.93 per access line per month, with a standard deviation of $2.25. Company A's operating expenses were $28.00 per access line per month. Assuming a normal distribution of operating expenses, estimate the percentage of regional phone companies whose operating expenses were closer to the mean than the operating expenses of Company A were to the mean. (Round your answer to two decimal places.) %