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Statistics

Statistics deals with collecting, organizing, and interpreting numerical data. An important aspect of statistics is the analysis of population characteristics inferred from sampling.

36,755 Questions

How many fish can you have in a seventy two gallon fish tank?

depends on the size of the fish, the filtration, if it is salt or fresh... lots of variables.

A very rough estimate has always been 1 inch of fish per gallon of water.

What does uberstar mean?

Uberstar is the xbox live gamertag for a particularly skilled gamer.

How many 5 digit numbers can be made only using the numbers 1 2 3 4 5 with out repeating a number twice example 12345 12354 12435?

The first number can be selected 5 ways, the second 4 ways, the third three ways, the fourth two ways and the fifth one way so total number of ways is

5 x 4 x 3 x 2 x 1 = 120 ways

What is the probability of getting an a from Alabama?

There are four a's in ALABAMA. The probability of choosing an a from a random draw of those seven letters is 4 in 7, or about 0.5714.

If you are talking about getting a grade of A from a school in Alabama, that is entirely up to you and to how well you apply yourself.

How does the number of repetitions effect the shape of the normal distribution?

When we discuss a sample drawn from a population, the larger the sample, or the large the number of repetitions of the event, the more certain we are of the mean value.

So, when the normal distribution is considered the sampling distribution of the mean, then more repetitions lead to smaller values of the variance of the distribution.

What is the biggest nine digit number?

The biggest nine digit number would consist fully of '9's: 999,999,999

Explain how can you plot favorite colors of a sixth-grade class on a line plot?

There are several answers which suggest this is simple but, as far as I can see, it is not. The height of the line must be the number of pupils who pick a particular colour but what about the "horizontal" axis. Should the order be red, blue, green? or red, green, blue? And why? Is the distance between red and blue the same as the distance between blue and green? Again, why - or why not? If you restrict yourself to the electromagnetic spectrum for visible light (rainbow colours), where would black and white and brown and purple go?

The three primary colours (red, green and blue) can be used to generate other colours and so these three components can be used as "coordinates" to define any basic colour. But even this is not enough to distinguish between red and pink (=red+white). To do that you would need to add three more dimensions - hue, saturation, luminance.

In the first case you could plot the information as a surface (not a line) in 4-dimensional space where the 3 independent variables are the amount or red, blue and green in the colour and the dependent variable is the pupil count. In the second case, you need a 7-dimensional space! Easy? I think not!

For an example of the RGB combinations, select format -> font -> font colour in Word, then select more colours and then custom. The default there is the RGB combination. The alternative is HSL.

How many digits is on 70 billlion?

The number seventy billion is written 70,000,000,000 - eleven digits in total.

What does 10.5 represent mean mode range or median?

It is not possible to tell without more information. As it is, it could be any of them.

Find the standard deviation for the following data: 15, 18, 21, 22, 26, 28, 31, 39?

The numbers posted are multiples of 3. In the question, you will find that if you look closely, you can find that some of the numbers are 2 numbers away from the original number

What is the an estimate of a skateboard?

If you are a beginner I would not spend over $50. Intermediate to advanced you can expect $60 to $120. You can find top quality complete skateboards for around $80 at any local skateshop. Try Ebay, they sell alot of pro grade skateboards for wholesale prices -- Beginner : $20 - $40 (Toy store or a 'Mart") Intermediate: $40 - $80 (Toy store or a 'Mart" or a Sporting goods store) Expierienced: $80 - $120(Sporting goods store, skate shop) Pro Setup: $120 - $160 (skate shops, manufacturers direct) Custom pro setup: $160 - $???(I've seen customs over $500.)(Manufacturers direct) - VooDoo 13 -