Mr. Washington made several purchases for his printing business. The mean price of the purchases was $150, and the mean absolute deviation was $30. Based on this information, which statement must be true? One purchase was $150. Two purchases were $30 apart in price. All of the purchase prices were between $120 and $180. The average difference in purchase price is $30 away from $150.

What is the rate for one gallon of gasoline

Y= 4x + 3 y = - 1 4 x - 5 what is the best description for the lines represented by the equations?

Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.