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NT=Observed time per unit x Performance rating
ST=NT(1+Allowances) or { NT/(1-Allowances) if he works in a period eg 8 hours.}
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What must be done to a normal curve to make it into a standard normal distribution curve?
The mean must be 0 and the standard deviation must be 1. Use the formula: z = (x - mu)/sigma
What is the formula to determine the standard deviation of the resulting normal distribution when adding two normal distributions with different means and standard deviations?
s= bracket n over sigma i (xi-x-)^2 all over n-1 closed bracket ^ 1/2
What is the difference of a normal distribution and a stardard normal distribution?
The standard normal distribution is a special case of the normal distribution. The standard normal has mean 0 and variance 1.
He area under the standard normal curve is?
The area under the standard normal curve is 1.
What proportion of a normal distribution is located between z-0.90 and z 0.90?
0.368 or 36.8%.And you should specify that it is a standard normal distribution.0.368 or 36.8%.And you should specify that it is a standard normal distribution.0.368 or 36.8%.And you should specify that it is a standard normal distribution.0.368 or 36.8%.And you should specify that it is a standard normal distribution.
What is the formula to convert normal distribution to the standard normal distribution?
If a variable X, is distributed Normally with mean m and standard deviation s thenZ = (X - m)/s has a standard normal distribution.
What is the difference between normal time cycle time and standard time in performance review?
standard time : Normal time + allowance Normal time : the time it takes for the operator to do his job at a normal , comfortable pace with out any allowances ( breaks )
What are the advantages of using the standard normal distribution over the normal distribution?
There is no simple formula to calculate probabilities for the normal distribution. Those for the standard normal have been calculated by numerical methods and then tabulated. As a result, probabilities for the standard normal can be looked up easily.
What is the Direct labor efficiency variance formula?
(actual time * standard rate) - (standard time * standard rate)
Can the standard normal variate in normal distributions be negative?
About half the time.
What is the formula for Standard allowed minute calculation in apparel industry?
Standard Allowed Time is computed from Live Time Study or Standard Data Analysis (SPD) Standard Allowed Minutes (SAMs) is calculated as follows: Total Raw Cycle Time / # valid Operation Cycles = Average Time (minutes) Average Time x Leveling Factor = Normal Time (minutes) Normal Time + P. F. & D. = Standard Allowed Time (minutes) Cycle time is the time it takes for one complete unit for that operation Operation cycles are valid if their value is within 1 standard deviation of the Average Time. Leveling Factor is determined by the engineer for the worker being observed (not calculated when using Standard Data Analysis P. F. & D. is Personal Fatigue and Delay a percentage added to compensate for normal working conditions and the specific operation. Personal is typical at 5% added to the Normal Time.
What is the formula for velocity when you know time and acceleration?
The standard formula is A = v/t With slight formula manipulation you get At = v
What must be done to a normal curve to make it into a standard normal distribution curve?
The mean must be 0 and the standard deviation must be 1. Use the formula: z = (x - mu)/sigma
Formula for normal time in industrial engineering?
normal time is calculated by... average cycle time x (% rating factor/100)
What is the standard Accident Prevention Formula?
Recognize the hazard.Understand the defense.Act correctly in time.
What is the standard deviation of a standard normal distribution?
The standard deviation in a standard normal distribution is 1.
In the standard normal distribution the standard deviation is always what?
The standard deviation in a standard normal distribution is 1.
