Suppose the nightly rate for a three-star hotel in Paris is thought to be bell-shaped and symmetrical with a mean of 160 euros and a standard deviation of 8 euros. The percentage of hotels with rates between 144 and 176 euros is

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This scenario describes a normal distribution, where 144 and 176 euros are two standard deviations below and above the mean, respectively (160 - 2*8 = 144, 160 + 2*8 = 176). According to the empirical rule (68-95-99.7 rule) for normal distributions, approximately 95% of the data falls within two standard deviations of the mean.

Suppose the Nightly Rate for a Three-Star Hotel in Paris