Exhibit 18-6 It Is Believed That the Median Yearly Income in a in a Suburb

Multiple Choice

Exhibit 18-6
It is believed that the median yearly income in a suburb of Atlanta is $70,000. A sample of 67 residents was taken. Thirty-eight had yearly incomes above $70,000, 26 had yearly incomes below $70,000, and 3 had yearly incomes equal to $70,000. The null hypothesis to be tested is H₀: median = $70,000.
-Refer to Exhibit 18-6. The mean and the standard deviation (respectively) for this test about the median are

A) 32 and 4
B) 32 and 16
C) 33.5 and 4
D) 33.5 and 16