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3 years ago

Forecast error is found by subtracting the forecast from the actual demand for a given period. True or False

Physics

2 answers:

Burka [1]3 years ago

7 0

Answer:

The correct option is;

True

Explanation:

The forecast error provides the estimates of the level of deviation of the forecast from the observed actual demand within a period under study

The forecast error is defined as the difference between the observed actual demand and the forecast demand expressed as a percentage or an absolute value.

Forecast error determination is important to judge the accuracy of a given demand forecast within a specified time frame.

Forecast error is expressed as

Et = Dt - Ft

Where:

E = Forecast error

F = Forecast

D = Demand

t = Time.

kap26 [50]3 years ago

5 0

Answer:

True

Explanation:

Forecast error can be referred to as the deviation of the actual demand from the forecasted or predicted demand.

In other words, it is the difference between the actual or real and the predicted or forecast value of a time series.

From the definition, we understand that forecast error is all about how much is the difference between what's is been forecasted and the actual value.

Mathematically,

Forecast Error = Actual Value of Demand - Forecasted Value of Demand.

Irrespective of whether the actual prediction is smaller or not; on a more standard term, it is calculated as follows

Forecast Error = ABS (Actual – Forecast)

Where ABS = the absolute value of....

And it always returns a positive value of the expression in brackets

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An object is hanging by a string from the ceiling of an elevator. The elevator is moving upward with a constant speed. What is t

xeze [42]

Answer:

The magnitude of the tension in he string is equal to the magnitude of the weight of the object.

Explanation:

According to the Newton's 1st law, An object will remain at rest or in uniform motion in a straight line unless acted upon by an unbalanced force.

In here, the elevator is moving with a constant speed. So the object must have the equal constant speed. Which means, it has a uniform motion. According to Newton's 1st law, the total unbalanced force on the object must be zero . As we know, there are only two forces are on the object and they are,

The tension in string(T) , The weight of the object(W) .

∴ F = 0

T - W = 0

So to balanced those forces, the magnitude of the tension in the string must be equal to the magnitude of the weight of the object.

8 0

3 years ago

In a thundercloud there may be an electric charge of +40 C near the top of the cloud and -40 C near the bottom of the cloud. The

Ratling [72]

Answer:

Electric force, $F=-3.59\times 10^6\ N$

Explanation:

Given that,

Electric charge 1, $q_1=+40\ C$

Electric charge 2, $q_2=-40\ C$

Distance, $d=2\ km=2\times 10^3\ m$

To find,

The electric force between these two sets of charges.

Solution,

There exists a force between two electric charges and this force is called electrostatic force. It is equal to the product of electric charged divided by square of distance between them.

$F=k\dfrac{q_1q_2}{d^2}$