# Question

Depending on where you live and on the quality of the day care, costs of day care can range from $3000 to $15,000 a year (or $250 to $1250 a month) for one child, according to the Baby Center. Day care centers in large cities such as New York and San Francisco are notoriously expensive. Suppose that day care costs are normally distributed with a mean equal to $9000 and a standard deviation equal to $1800. Source: http://www.babycenter.com/

a. What percentage of day care centers cost between $7200 and $10,800?

b. What percentage of day care centers cost between $5400 and $12,600?

c. What percentage of day care centers cost between $3600 and $14,400?

d. Compare the results in a through c with the empirical rule. Explain the relationship.

a. What percentage of day care centers cost between $7200 and $10,800?

b. What percentage of day care centers cost between $5400 and $12,600?

c. What percentage of day care centers cost between $3600 and $14,400?

d. Compare the results in a through c with the empirical rule. Explain the relationship.

## Answer to relevant Questions

According to Collegeboard.com [http://www.college- board.com/] the national average salary for a plumber as of 2007 is $47,350. If we assume that the annual salaries for plumbers are normally distributed with a standard ...According to ACT, results from the 2008 ACT test-ing found that students had a mean reading score of 21.4 with a standard deviation of 6.0. Assuming that the scores are normally distributed, a. find the probability that a ...A machine fills containers with a mean weight per container of 16.0 oz. If no more than 5% of the containers are to weigh less than 15.8 oz, what must the standard deviation of the weights equal? (Assume normality.) Using the z(a) notation (identify the value of a used within the parentheses), name each of the standard normal variable z’s shown in the following diagrams Using Table 4A and the symmetry property of the normal distribution, complete the following charts of z-scores. The area given in the tables is the area to the right under the normal distribution in the figures. a. z-scores ...Post your question

0