Question: Problems 7 – 9 find the critical value or values and determine the conclusion. The test value is given in the problem so you don’t have to calculate it but show work.

An attorney claims that more than 25% of all lawyers advertise. A sample of 200 lawyers in a certain city showed that 64 had used some form of advertising. At is there enough evidence to support the attorneys claim?

Ho: p H1: p 0.250

The test value is z=2.12