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Quick Confidence Interval
Quick Confidence Interval5.0
In statistics, confidence intervals can be used to express the degree to which sample results are reliable. Confidence intervals are often stated in terms of a percentage like 90% or 95%. When the sample or population distribution is the Normal (bell-shaped) distribution, the confidence intervals c
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Quick Mean Difference
Quick Mean Difference5.0
The mean difference is a measure of statistical dispersion between means of two independent samples. This app tests the hypothesis that the means, μ, of two samples are equal at some level of probablility, p. The relevant statistic is the Student's t-test for the appropriate probability and degrees
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Control Zone Rally
Control Zone Rally5.0
The CZ Rally app is designed for a particular type of automobile rally called a Control Zone Rally or for any rally with a single stage having a single average speed the must be maintained over the entire stage. In a Control Zone Rally you are given some combination of time, speed, and distance re
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Save $$$$
Save $$$$5.0
Use this app to determine a savings plan in one of two ways: by computing how much will be accumulated by saving a particular amount period (day, week, or month) over a given amount of time, or by computing how much must be saved each period over time to achieve your savings goal. Periodic amounts
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Treasurys
Treasurys5.0
The U.S. Department of the Treasury in conjunction with the Federal Reserve System provides yields for bills, notes, and bonds at various maturities for each day in which the instruments are available for trading. This app shows those yields starting on the first trading day of January 2010 onward.
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Six Functions of a $1
Six Functions of a $15.0
Six Functions of a $1 is a suite of financial calculations commonly used in finance, economics, investment analysis, and valuation. These functions are especially useful to students learning about time value of money concepts. Key input variables are amount, annual interest rate, and term or length
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Rally Controls Planner
Rally Controls Planner4.0
The Rally Controls Planner app is designed to help Rally Masters layout a course and identify possible locations for controls, route changes, or other typical rally actions. Time and distance measured from the start of the first control (Control #0) are computed by from GPS coordinates. The time, s
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GPS Rally Computer
GPS Rally Computer3.5
GPS Rally Computer is a Universal app designed to simplify computations necessary to navigate a traditional time-speed-distance (TSD) automobile rally. The design and implementation is based on specifications outlined by Clarence Westburg and Rich Bireta, commonly known as the Simple Rally Computer
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Quick Bootstrap Statistics
Quick Bootstrap Statistics3.0
Bootstrapping is a technique for measuring sample statistics from a relatively small set of data elements. By randomly resampling with replacement from the array of data elements, the software is able to generate a distribution that approximates the Normal Distribution from which parametric statisti
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GPS Twin Odometers
GPS Twin Odometers3.0
Historic, Classic, or Vintage road rallies may permit digital dual odometers, clocks, and stopwatches. This app combines all three using timers and GPS devices built into Apple mobile devices. GPS inputs are used strictly for distance measures along the rally route. Also, the displayed accuracy of
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Open Road Race Timer
Open Road Race Timer2.7
The Open Road Race Timer is designed for high speed automobile racing on closed highways. The race objective is to travel a course of known length at a set rate of speed. That combination of speed and distance translates into a target time to reach the finish line. Your starting time will also be
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Rally Computer Remote
Rally Computer Remote2.5
Rally Computer Remote is a companion app to the TSD Rally Computer and the GPS Rally Computer apps. Rally Computer Remote serves as a heads-up display for the rally driver and shows the current required average speed or CAST, the current odometer reading, and the progress ahead or behind schedule f
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TSD Rally Computer
TSD Rally Computer2.0
TSD Rally Computer is an iPad app designed to simplify computations necessary to navigate a traditional time-speed-distance (TSD) automobile rally that requires manual entry of odometer distance. A TSD rally is comprised of stages set along a route defined by written instructions. The first stage i
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Quick Linear Regression
Quick Linear Regression1.0
In statistics, linear regression is a technique for estimating the relationship between an independent variable, X, and its scalar result, the dependent variable, Y, derived from a series of X-Y relationships. The computational routine involves trying to fit a straight line between a scatter plot o
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Quick Present Value
Quick Present Value1.0
Quick Present Value offers a fast and easy way to compute the present value of a stream of annual amounts at discount rates ranging from 0% to 25% in increments of 0.125%. The unique data entry GUI employing sliders and buttons improves upon the more typical numeric pad mechanism. Using a slider f
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Quick Correlation Coefficients
Quick Correlation Coefficients1.0
The correlation coefficient (commonly noted by the Greek letter rho, ρ) measures the degree to which two sets of numbers are related. The correlation coefficient can range from -1.000 to +1.000 with a 0 indicating that there is no relation between the two sets. A 'slider' data entry option allows r
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NCREIF Property Index
NCREIF Property Index-
The NCREIF Property Index provides quarterly and annual total returns for thousands institutional-grade office, retail, apartment, industrial, and hotel properties. All properties in the NPI have been acquired and managed on behalf of tax-exempt institutional investors, principally pubic and private
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NCREIF MVI
NCREIF MVI-
NCREIF has created three new data series derived from commercial properties that qualify for the flagship NCREIF Property Index (NPI). All properties in the NPI have been acquired and managed on behalf of tax-exempt institutional investors, principally pubic and private pension funds. Whereas the
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Correlation Confidence Intvls
Correlation Confidence Intvls-
Correlation is a quantitative tool commonly used by researchers to separate data sets into independent subgroups. Hypothesis testing determines whether or not the subgroups are numerically distinct. The degree to which the researcher can say the subgroups are distinct depends upon the overlap betwee
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Quick Internal Rate of Return (IRR)
Quick Internal Rate of Return (IRR)-
‘Quick Internal Rate of Return’ offers a fast and easy way to compute the IRR of a stream of annual amounts usually starting with an investment treated as a negative amount. The unique data entry GUI employing sliders and buttons improves upon the more typical keypad pad mechanism.<br><br>However, t
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TOD-Split
TOD-Split-
The TOD Split consists of two clocks with different purposes. Time•Of•Day on the left is a 12-hour clock. The Time•Of•Day clock can be stopped by touching the button on the left side. Retouching the button will cause the digital clock display to resume tracking time-of-day.<br><br>
Stop•Split on the
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Dual Splits
Dual Splits-
The Dual Splits Timer consists of two stopwatches each with a split timer. The stopwatches may be started and stopped either separately or together. 
Each stopwatch has two buttons: one starts the stopwatch and resumes after a split and the other records each split time shown in red numbers on a wh
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NCREIF Farmland and Timberland
NCREIF Farmland and Timberland-
The NCREIF Farmland and Timberland Indices provide quarterly and annual total returns for large pools of institutional-grade agricultural and timber forest properties. All these properties have been acquired and managed on behalf of tax-exempt institutional investors, principally pubic and private p
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TSD Rally Clock
TSD Rally Clock-
The TSD Rally Clock allows you to synchronize to the Official Rally Time by making adjustments in increments of +/– 0.1seconds to account for total errors of as much as + or – 10 seconds. Touch the Lock icon to make clock adjustments. Adjust time ahead or behind as needed and, when finished, touch
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TSD Rally Split
TSD Rally Split-
The TSD Rally Split consists of two clocks with different purposes. Master•Time on the left is the rally time-of-day clock. This clock can be adjusted to synchronize with the Official Rally Time clock. Also, the Master•Time clock can be split/stopped by touching the button on the left side. Retouchi
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Toggle Split
Toggle Split-
The Toggle Split timers consist of two stopwatches each with a split timer. You can alternate between Toggle•Split•A and Toggle•Split•B by touching the segmented button beneath the stopwatches. 
Each stopwatch has two buttons: one starts the stopwatch and resumes after a split and the other record
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Efficient Frontier
Efficient Frontier-
Modern Portfolio Theory (MPT) recognizes that investment returns also carry risks. When assembling a portfolio of risky assets, it is necessary to account for these two components as well as the correlation among the assets.<br><br>When risky assets are combined in a portfolio, the expected return o
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TSD GPS Manual
TSD GPS Manual-
Some TSD rallies require traditional equipment and limited computational devices. For those rallies that require manual entry of distance into any computation of ideal time to travel at a given speed, this app provides that capability.<br><br>GPS inputs are used strictly for distance measurement alo
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GPS Rally Odometer
GPS Rally Odometer-
This app is designed for various types of automobile rallies that require measurement of time, speed, or distance between segments of the rally route including stages and checkpoints. To make sure that all initial conditions are set properly when using GPS, touch the "Reset/Pause" button and choose
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