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Why does the sum of all relative frequencies always equal 1?

The sum of all relative frequencies equals 1 because relative frequency represents the proportion of each category relative to the total number of observations. When you add up all proportions, they collectively reflect the complete dataset. Since every observation must fall into one of the categories, the total relative frequency accounts for all possibilities, thus summing to 1. This ensures that the distribution of frequencies accurately represents the whole.


Normal distribution it is always true that mean equals median equals mode?

Yes- this can be proved from the normal distribution function.


92.7 sec equals what frequencies?

0.01078748651 hertz


What is The normal probability distribution with µ equals 0 and σ equals 1?

It is the Standard Normal distribution.


Is the area under the standard normal distribution to the left of z equals 0 negative?

The Z value is negative, but area is always positive.


For lamda equals 5.5 the probability of x equals 2 is?

The answer depends on what the distribution is!


Does mode equal median in a normal distribution?

Yes, mode equals median in a normal distribution.


An area of a normal probability distribution represents?

The number 1. The area of any probability distribution equals 1.


When the temperatures equals the dew point what is the relative humidity?

100%


The mean of a symmetrical distribution is 40What is its median?

for symmetrical distributions your mean equals the median. that is one of the properties of the symmetrical distribution.


Does mode equals the median normal distribution?

Yes it is. The normal distribution is symmetrical around the mode. Therefore the median has to be the same :)


What is mass of gold if relative density equals 19.3?

Insufficient data.