The probability of being acquitted in criminal court in Westfield, MA is .40 (The probability of an acquittal is .40 with for defendants with public defendants).You take a random sample of the past 10 criminal cases where the defendant had a public defender and find that there were 7 acquittals out of 10 cases.

Do defendants with public defenders are more likely to be acquitted than are defendants with other types of lawyers?

Test the above hypothesis with using the alpha = .05.The probability and cumulative probability of 0 to 10 acquittals if the probability of an acquittal is .40 are shown below.

# of Acquittals p cp

0 .0060 1.0000

1 .0403 .9940

2 .1209 .9537

3 .2150 .8328

4 .2508 .6178

5 .2007 .3670

6 .1115 .1663

7 .0425 .0548

8 .0106 .0123

9 .0016 .0017

10 .0001 .0001