# Question: How much money does a typical family of four spend

How much money does a typical family of four spend at a McDonald’s restaurant per visit? The amount is a normally distributed random variable with a mean of $16.40 and a standard deviation of $2.75.

a. Find the probability that a family of four spends less than $10.

b. What is the amount below which only 10% of families of four spend at McDonald’s?

a. Find the probability that a family of four spends less than $10.

b. What is the amount below which only 10% of families of four spend at McDonald’s?

**View Solution:**## Answer to relevant Questions

The final marks in a statistics course are normally distributed with a mean of 70 and a standard deviation of 10. The professor must convert all marks to letter grades. She decides that she wants 10% A’s, 30% B’s, 40% ...According to the Statistical Abstract of the United States, 2012 (Table 721), the mean family net worth of families whose head is between 35 and 44 years old is approximately $325,600. If family net worth is normally ...The annual rate of return on a mutual fund is normally distributed with a mean of 14% and a standard deviation of 18%.a. What is the probability that the fund returns more than 25% next year?b. What is the probability that ...Toll booths on the New York State Thruway are often congested because of the large number of cars waiting to pay. A consultant working for the state concluded that if service times are measured from the time a car stops in ...Use a computer to find the following probabilities.a. P(t141 > .94)b. P(t421 > 2.00)c. P(t1000 > 1.96)d. P(t82 > 1.96)Post your question