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  2. Point estimation - Wikipedia

    en.wikipedia.org/wiki/Point_estimation

    The number γ is called the confidence level. [1] In general, with a normally-distributed sample mean, Ẋ, and with a known value for the standard deviation, σ, a 100(1-α)% confidence interval for the true μ is formed by taking Ẋ ± e, with e = z 1-α/2 (σ/n 1/2 ), where z 1-α/2 is the 100(1-α/2)% cumulative value of the standard ...

  3. Weighted-average life - Wikipedia

    en.wikipedia.org/wiki/Weighted-Average_Life

    In finance, the weighted-average life (WAL) of an amortizing loan or amortizing bond, also called average life, [1] [2] [3] is the weighted average of the times of the principal repayments: it's the average time until a dollar of principal is repaid. In a formula, [4] = =,

  4. Debt service coverage ratio - Wikipedia

    en.wikipedia.org/wiki/Debt_service_coverage_ratio

    Debt Service = (Principal Repayment) + (Interest Payments) + (Lease Payments) [3] To calculate an entity's debt coverage ratio, you first need to determine the entity's net operating income (NOI). NOI is the difference between gross revenue and operating expenses.

  5. How to budget with the 50/30/20 rule: A simple, effective ...

    www.aol.com/finance/50-30-20-budgeting-rule...

    Using the 50/30/20 rule, Sophia covers her essential needs first, which takes up the largest portion of her budget at 50%. Thirty percent is allocated to non-essential wants, while the remaining ...

  6. Dog Trainer Shares the Secret to Getting Puppies to Stop ...

    www.aol.com/dog-trainer-shares-secret-getting...

    Like Taylor, a trainer in another Pet Helpful article recommends making sure your puppy is getting enough ZZZs, "Pet owners give their dog frequent naps throughout the day in their crate "away ...

  7. Algorithms for calculating variance - Wikipedia

    en.wikipedia.org/wiki/Algorithms_for_calculating...

    This algorithm can easily be adapted to compute the variance of a finite population: simply divide by n instead of n − 1 on the last line.. Because SumSq and (Sum×Sum)/n can be very similar numbers, cancellation can lead to the precision of the result to be much less than the inherent precision of the floating-point arithmetic used to perform the computation.

  8. Can the 'coffee loophole' keep your hunger at bay?

    www.aol.com/coffee-loophole-keep-hunger-bay...

    Coffee contains caffeine, a stimulant that can increase metabolic rate by 5–20% for at least three hours post-consumption, potentially leading to a small boost in the number of calories your ...

  9. Probability of default - Wikipedia

    en.wikipedia.org/wiki/Probability_of_default

    Agency Replication model: Calibrate financial/non-financial factors/scorecard score to PDs estimated from the Agency Direct model. This approach works well where there is a large, co-rated dataset but a small sample of internal defaults—e.g. Insurance portfolio; External vendor model: Use of models such as MKMV EDF model with credit cycle ...