# Question

A study of water use in Gainesville, Florida, indicated that in 2006 residential water consumption had a mean of 78 and a standard deviation of 119, in thousands of gallons.

a. If the distribution of water consumption were approximately normal, then what proportion of the residences used less than 100,000 gallons in 2006? (Assume negative infinity to 100 in calculating the proportion.)

b. In fact, the distribution of water use was not actually normal. What shape do you expect the distribution to have? Why?

a. If the distribution of water consumption were approximately normal, then what proportion of the residences used less than 100,000 gallons in 2006? (Assume negative infinity to 100 in calculating the proportion.)

b. In fact, the distribution of water use was not actually normal. What shape do you expect the distribution to have? Why?

## Answer to relevant Questions

Mac’s fast-food restaurant finds that its daily profits have a normal distribution with mean $140 and standard deviation $80. a. Find the probability that the restaurant loses money on a given day (that is, daily profit ...A weather forecaster states, “The chance of rain is 50% on Saturday and 50% again on Sunday. So there’s a 100% chance of rain sometime over the weekend.” If whether or not it rains on Saturday is independent of whether ...For the Boston to Chicago route, an airline flies a Boeing 737–800 with 170 seats. Based on past experience, the airline finds that people who purchase a ticket for this flight have 0.80 probability of showing up for the ...Simulate an exit poll of 100 voters, using the Sampling Distributions applet on the text CD, assuming that the population proportion is 0.53. Refer to Activity 1 for guidance on using the applet. a. What sample proportion ...For the population of farm workers in New Zealand, suppose that weekly income has a distribution that is skewed to the right with a mean of μ = +500 (N.Z.) and a standard deviation of σ = +160. A researcher, unaware of ...Post your question

0