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Standard Deviation given Probability Factor Formula

GoStandard Deviation of Activity Formula

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The Standard Deviation is a measure of how spread out numbers are. Check FAQs

σ = \frac{T s - t e}{Z}

σ - Standard Deviation?T_s - Scheduled Time?t_e - Mean Time?Z - Probability Factor?

Standard Deviation given Probability Factor Example

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Here is how the Standard Deviation given Probability Factor equation looks like with Values.

Here is how the Standard Deviation given Probability Factor equation looks like with Units.

Here is how the Standard Deviation given Probability Factor equation looks like.

1.33 = \frac{6.7 - 4}{2.03}

1.33 = \frac{6.7d - 4d}{2.03}

1.33 = \frac{6.7 - 4}{2.03}

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Standard Deviation given Probability Factor Solution

Follow our step by step solution on how to calculate Standard Deviation given Probability Factor?

FIRST Step Consider the formula

σ = \frac{T s - t e}{Z}

Next Step Substitute values of Variables

∴

σ = \frac{6.7d - 4d}{2.03}

Next Step Prepare to Evaluate

∴

σ = \frac{6.7 - 4}{2.03}

Next Step Evaluate

∴

σ = 1.33004926108374

LAST Step Rounding Answer

∴

σ = 1.33

Standard Deviation given Probability Factor Formula Elements

Variables

Standard Deviation

The Standard Deviation is a measure of how spread out numbers are.

Symbol: σ

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Standard Deviation

Scheduled Time

Scheduled Time is the time which is made as per the experience and practice by the creator of the project.

Symbol: T_s

Measurement: TimeUnit: d

Note: Value should be greater than 0.

Formulas to find Scheduled Time

Mean Time

Mean Time, also called expected time is the time needed to complete an activity.

Symbol: t_e

Measurement: TimeUnit: d

Note: Value should be greater than 0.

Formulas to find Mean Time

Probability Factor

The probability Factor is a term used to find the probability of a project getting completed in the expected time.

Symbol: Z

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Probability Factor

Other Formulas to find Standard Deviation

Go Standard Deviation of Activity

σ = \frac{t p - t 0}{6}

Other formulas in Project Evaluation and Review Technique category

Go Mean or Expected Time

t e = \frac{t 0 + (4 \cdot t m) + t p}{6}

Go Optimistic Time given Expected Time

t 0 = (6 \cdot t e) - (4 \cdot t m) - t p

Go Pessimistic Time given Expected Time

t p = 6 \cdot t e - t 0 - 4 \cdot t m

Go Most Likely Time given Expected Time

t m = \frac{6 \cdot t e - t 0 - t p}{4}

How to Evaluate Standard Deviation given Probability Factor?

Standard Deviation given Probability Factor evaluator uses Standard Deviation = (Scheduled Time-Mean Time)/Probability Factor to evaluate the Standard Deviation, The Standard Deviation given Probability Factor formula is defined as representing a measurement of uncertainty in an occurring event. Standard Deviation is denoted by σ symbol.

How to evaluate Standard Deviation given Probability Factor using this online evaluator? To use this online evaluator for Standard Deviation given Probability Factor, enter Scheduled Time (T_s), Mean Time (t_e) & Probability Factor (Z) and hit the calculate button.

FAQs on Standard Deviation given Probability Factor

What is the formula to find Standard Deviation given Probability Factor?

The formula of Standard Deviation given Probability Factor is expressed as Standard Deviation = (Scheduled Time-Mean Time)/Probability Factor. Here is an example- 1.330049 = (578880-345600)/2.03.

How to calculate Standard Deviation given Probability Factor?

With Scheduled Time (T_s), Mean Time (t_e) & Probability Factor (Z) we can find Standard Deviation given Probability Factor using the formula - Standard Deviation = (Scheduled Time-Mean Time)/Probability Factor.

What are the other ways to Calculate Standard Deviation?

Here are the different ways to Calculate Standard Deviation-

Standard Deviation=(Pessimistic Time-Optimistic Time)/6

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Standard Deviation given Probability Factor Formula

​GoStandard Deviation of Activity Formula

Standard Deviation given Probability Factor Example

Standard Deviation given Probability Factor Solution

Standard Deviation given Probability Factor Formula Elements

Other Formulas to find Standard Deviation

Other formulas in Project Evaluation and Review Technique category

How to Evaluate Standard Deviation given Probability Factor?

FAQs on Standard Deviation given Probability Factor

Variable Name

GoStandard Deviation of Activity Formula