a) Define Null hypothesis, Research hypothesis and marginals with examples. b) Dr. Matiur takes a random sample of the speeches, interviews, and official statements given by the prime minister and the state minister of Bangladesh over the course of a year in which reference is made to prison policy. He analyzes the content of the statements in his sample and discovers five different types of justification for the government's prison policy. Dr. Matiur then records each time the prime minister or state minister refers to any of the five justification types. The results are as follows: Justification Type Prime Minister Incapacitation or protecting society Specific deterrence General deterrence Rehabilitation Retribution 6 2 4 0 13 State Minister 16 14 20 15 10 --Is there a statistically significant difference between the policy statements of the prime minister and those of the interior minister? Use a 5% level of significance and outline each of the steps required in a test of statistical significance. --Would your answer be any different if a 1% level of significance were used?