Question:This exercise uses the normal probability density function and
requires the use of either technology or...
Question
This exercise uses the normal probability density function and
requires the use of either technology or...
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
$29.89 per access line per month, with a standard deviation of
$2.75. Company A's operating expenses were $27.00 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.)