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Question 5 A social worker believes that more than 50% of social grant were spent on alcohol and cigarettes. To test this belief, the social worker randomly selected 300 cashflows and found that 65% of the social grant were used in alcohol and cigarettes and the population standard deviation is 5%. Constructs a 10% level of significance of the claim that more than 50% of social grant were spent on alcohol and cigarettes. (9 Marks) Note: . 10% level of significance: critical value: 1.645 5% level of significance: critical value: 1.96 1% level of significance: critical value: 2.58