Determine the critical value ( s ) of the test statistic. z = ( Use a comma to separate answers as needed. Round to two decimal places as needed. ) Calculate the test statistic. z p = ( Round to two decimal places as needed. ) Determine the proper conclusion. Choose the correct answer below. A . Reject H 0 . There is insufficient evidence that the proportion of people with credit scores below 600 has increased. b . Determine the p - value for this test. p - value = , ( Round to three decimal places as needed. C Identify and interpret the critical sample proportion or proportions for this problem Since the sample proportion is ___ extreme than the critical levels of __ the null hypothesis is ___