In 1998 the average income for middle class families in the US was $37,100 with a population standard deviation of $6362. We wanted to check how

In 1998 the average income for middle class families in the US was $37,100 with a population standard deviation of $6362. We wanted to check how representative the 1998 GSS survey was of the American adult population from which it was drawn. The 1998 GSS survey found a mean income of $36,670 for its sample of 1225 middle-class American adults. Use this information to answer the following questions:

Which test statistic would be appropriate for this research problem?

Z test

T test

Chi square

None of the above