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  2. Point estimation - Wikipedia

    en.wikipedia.org/wiki/Point_estimation

    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 normal curve, and n is the number of data values in that ...

  3. Time value of money - Wikipedia

    en.wikipedia.org/wiki/Time_value_of_money

    Time value of money problems involve the net value of cash flows at different points in time. In a typical case, the variables might be: a balance (the real or nominal value of a debt or a financial asset in terms of monetary units), a periodic rate of interest, the number of periods, and a series of cash flows. (In the case of a debt, cas

  4. Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Excel

    Microsoft Excel is a spreadsheet editor developed by Microsoft for Windows, macOS, Android, iOS and iPadOS.It features calculation or computation capabilities, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications (VBA).

  5. Value of time - Wikipedia

    en.wikipedia.org/wiki/Value_of_time

    The value of time cannot be assumed constant over time. Time is a limited good and as productivity and income increase, the relative value of time increases as well. [5] Historically, the projection of the value of time has been closely linked to personal income growth, which in practical applications is typically approximated by GDP growth.

  6. Time value - Wikipedia

    en.wikipedia.org/wiki/Time_value

    In finance, time value is: Time value of money; or; Time value of an option. In transport economics, time value refers to: Value of time; In photography and cameras TVs, time value refers to: in the APEX system (Additive System of Photographic Exposure) Time value mode (Tv mode), a shutter priority mode on electronically controlled cameras

  7. Present value - Wikipedia

    en.wikipedia.org/wiki/Present_value

    The present value is usually less than the future value because money has interest-earning potential, a characteristic referred to as the time value of money, except during times of negative interest rates, when the present value will be equal or more than the future value. [1] Time value can be described with the simplified phrase, "A dollar ...

  8. Net present value - Wikipedia

    en.wikipedia.org/wiki/Net_present_value

    Time value of money dictates that time affects the value of cash flows. For example, a lender may offer 99 cents for the promise of receiving $1.00 a month from now, but the promise to receive that same dollar 20 years in the future would be worth much less today to that same person (lender), even if the payback in both cases was equally certain.

  9. Circular mean - Wikipedia

    en.wikipedia.org/wiki/Circular_mean

    As another example, the "average time" between 11 PM and 1 AM is either midnight or noon, depending on whether the two times are part of a single night or part of a single calendar day. The circular mean is one of the simplest examples of directional statistics and of statistics of non-Euclidean spaces. This computation produces a different ...