4. A bank president claims that the median of debt-to-equity ratio of commercial loans provided is less than 1.5. A random sample of 15 commercial loans is selected with the following values for this...

Extracted text: 4. A bank president claims that the median of debt-to-equity ratio of commercial loans provided is less than 1.5. A random sample of 15 commercial loans is selected with the following values for this ratio: 1.31 1.33 1.22 1.78 1.45 1.32 1.46 1.41 1.19 1.05 1.29 1.11 1.37 1.21 1.65 Use a Sign Test at the 0.05 level to test this claim. Do this by hand and not using Excel. 5. A labor economist believes the median income for the United States exceeds $45,000. A random sample on n= 100 is taken and 74 observations on income exceed $45,000 while 26 are below $45,000. Use a Sign Test for large samples to test this hypothesis at the 0,05 level. Solve this by hand ts)