29. The list prices of homes in a Central Ohio neighborhood have a mean of 168000 dollars and a standard deviation of 7000 dollars. The distribution is unknown. Using Chebyshev's Rule, in what interval about the mean would you expect to find at least 94% of the prices?

Interval is -

31. In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 49 and a standard deviation of 7. Using the Empirical Rule, what is the approximate percentage of daily phone calls numbering between 35 and 63?

35.Test grades are skewed left with a mean of 69 and a standard deviation of 5. Using Chebyshev's Rule, in what interval about the mean would you expect to find at least 89% of the grades?