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Functions based on the normal distribution are easy to retrieve in code or excel, so we do not really need z tables anymore, in practice. But we still want to understand the z table. Why? Because the popular exam calculators (TI BA II+ and HP 12c) do not include z table functionality, so we do
Recently 25 banks were surveyed. Their sample average total capital is 8.40% (i.e., Tier 1 plus Tier 2 as a percentage of risk-weighted assets, RWA) with a sample standard deviation of 1.0%. Our one-sided null hypothesis is that the population’s “true” average total capital is less than or equal to 8.0%.
According to Schroeck, economic capital is an estimate of the overall level of capital necessary to guarantee the solvencyof the bank at some predetermined confidence level. Which stakeholder tranche represents the “critical threshold” targeting by this confidence level?