## Questions by Blake from Trabuco Canyon, CA

A ferry will safely accommodate 70 tons of passenger cars. Assume that the mean weight of a passenger car is 1.8 tons with standard deviation 0.7 tons. If a random sample of 35 cars are loaded onto...

The mean number of pets per household is 3.25 with standard deviation 1.3. A sample of 59 households is drawn. Find the 74th percentile of the sample mean.

X is a normally distributed random variable with a mean of 9.00. If the probability that X is less than 9.66 is 0.67 (as shown below), then what is the standard deviation of X? (Note: the diagram...

The average diameter of sand dollars on a certain island is 4.50 centimeters with a standard deviation of 1.00 centimeters. If 16 sand dollars are chosen at random for a collection, find the probability...

The length of country and western songs is normally distributed and has a mean of 200 seconds and a standard deviation of 30 seconds. Find the probability that a random selection of 25 songs will...

The average number of mosquitos in a stagnant pond is 80 per square meter with a standard deviation of 12. If 25 square meters are chosen at random for a mosquito count, find the probability that...