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 . To test the null hypothesis, the appropriate probability distribution to use is
a. normal
b. chi-square
c. t distribution
d. binomial
A
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