Question

n the Energy Information Administration report The Effect of Income on Appliances in U.S. Households (Source: http://www.eia.doe.gov/emeu/recs/appliances/appliances.html), it is noted that 29 % of housing units with an annual income in the $15000 to $29999 range own a large-screen television. Assuming that this is true for the current population of housing units with an annual income in the $15000 to $29999 range, approximate (using a normal distribution) the probability that in a random sample of 500 such housing units, the number that have a large-screen television is

a. exactly 134

b. between 152 and 172 (inclusive).
c.no more than 129

.

Answer 1