I need the correct solution please unit data analysis

Question One The managing director of a nationwide real estate company is looking at the reasons as to why certain agencies outperform others. As a starting point she sampled 10 branches and collected data on Total Annual Sales (Sm) and Total Annual Advertising Expenditure ($000). Data is given in Table 1 below: TABLE 1 102 Sales (Smak 112 Advertising (72 122 1025 10.32 700 100 Over the last few years the average annual expenditure on advertising was $700,000. Test at the 5% level of significance whether or not average advertising expenditure has increased to more than $700,000. (3 marks) b. Construct a 98% confidence interval for the average annual sales last year. (3 marks) Suppose that the estimate that you calculated in part b. was not precise enough, and the director required an estimate correct to within $5m. What sample size would be necessary in order to meet this requirement? (2 marks) . If the director wanted to know if average annual sales had risen above $115m what would you conclude based on the results in part b.? Do you see any problems with using this result to answer the directors question? (2 marks) c. Are there any assumptions that you have made in order to do this analysis. Be specific about what they are and why they have made them. (1 mark) Question One The managing director of a nationwide real estate company is looking at the reasons as to why certain agencies outperform others. As a starting point she sampled 10 branches and collected data on Total Annual Sales (Sm) and Total Annual Advertising Expenditure ($000). Data is given in Table 1 below: TABLE 1 102 Sales (Smak 112 Advertising (72 122 1025 10.32 700 100 Over the last few years the average annual expenditure on advertising was $700,000. Test at the 5% level of significance whether or not average advertising expenditure has increased to more than $700,000. (3 marks) b. Construct a 98% confidence interval for the average annual sales last year. (3 marks) Suppose that the estimate that you calculated in part b. was not precise enough, and the director required an estimate correct to within $5m. What sample size would be necessary in order to meet this requirement? (2 marks) . If the director wanted to know if average annual sales had risen above $115m what would you conclude based on the results in part b.? Do you see any problems with using this result to answer the directors question? (2 marks) c. Are there any assumptions that you have made in order to do this analysis. Be specific about what they are and why they have made them. (1 mark)