30 40 50 60 70 80 90 100 110 Q For the graph shown above, we will use the Empirical Rule to find the percentage of values between 80 and 90. First, we note that 80 is 1 standard deviation above the mean of 70. By the Empirical Rule, 68% of values are within one standard deviation of the mean, as shown below. 30 40 50 60 70 80 90 100 110 QThus we know that 34 of % of values are between 70 and 80. And also, 90 is 2 standard deviations above the mean of 70. By the Empirical Rule, 95% of values are within two standard deviations of the mean, as shown below. + 30 40 50 60 70 80 90 100 110 Q Thus we know that 47.5 o" % of values are between 70 and 90. Part 2 of 2So this shaded area contains 34% of the data: 30 40 50 60 70 80 90 100 110 Q And this shaded area has 47.5% of the data: 30 40 50 60 70 80 90 100 110 Q And this is the original area that we wanted: 30 40 50 60 70 80 90 100 110 Q So therefore, 13.5 0 % of values must be between 80 and 90. As a probability, we have: P(80