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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

What did Rene Proportion do to develop proportion?

There is nobody by the name of Rene Proportion who was directly involved in the development of ratios and proportions. It is impossible to trace the origin of the concept of ratio or proportions, since the ideas from which it developed would have been familiar to ancient literate cultures. For example, the idea of one field being twice as large as another is so comprehensible that it would have been understood across societies.

How many feet are in one kilometer?

1 kilometer = 3,280.84 feet
One foot is equal to 0.0003048 kilometres. Therefore, one kilometre is equal to 1 / 0.0003048 = 3280.8399 feet.
One kilometer equals 3280.83989501 feet.

Kilo is the Greek root meaning thousand. One kilometer measured is 1000 meters which is equal to 3,281 feet. One kilometer is also equal to 0.62 miles.
One km is about 3,281 feet.

By unit of length and distance and conversion ,we can say that

1 km =3280.8399 ft

What is the difference between an inference and a hypothesis?

A hypothesis is a theory based from observations. Hypotheses generally haven't been tested, they are merely an explanation derived from available observations.

An inference is a conclusion obtained not through observable facts, but rather through observable trends. If such and such process were to continue trending, you would make an inference about the final state of the process. As with hypotheses, inferences have generally not been tested enough to be valid.

What is a sports statistician?

It is someone who keeps statistics on sports. They might be able to tell you names of players, or what teams or individuals won things in different years. They would have statistics on the performances of individuals and teams. They would be expert in the sports they specialise in. If someone needs information about a sport, they are a good person to ask.

Which is the best software for multivariate data analysis and experimental design?

I reckon you are looking at a scientific software which can help you do both....infact we are using a software package called as The Unscrambler and i would suggest you try it .It helps you do PCA, PLS , MCR etc with ease ...I have even heard about many other software packages but havn't really used them so cant really comment on those...

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What percentage of 42098 is 46?

Expressed as a percentage, rounded to three decimal places, 46/42098 x 100 = 0.109 percent.

What is the largest 8-digit number with no odd digit and only three digits are repeated twice?

Repeated twice means we're allowed three of them.

That would be 88,866,644.

If you really meant repeated, that would be 88,664,420

Does the average age of death mean the mean the median or the mode?

Mean is the mathematical term for the average in a set of numbers. In order to find this, one adds together the numbers and divides by how many there are in total. For instance, in the following set:

2 3 4 4 5 6

2 + 3 + 4 + 4 + 5 + 6 = 24 and there are 6 numbers --> 24/6 = 4; thus the mean or average is 4.

Mode is the number that appears the most. In this case, that number is also 4 as it appears twice whereas the other numbers appear only once each. In some circumstances, there will be sets of numbers that contain multiple numbers if not all that repeat. When this happens, the rule still applies, the number that repeats the most is the mode.

The median is the number with the middle value when the numbers in the set provided are listed by increasing value (small to large).

If there is an even amount of numbers in a set, then the 2 numbers that are left need to be added and divided by 2 in order to get the mean such as in this example. Crossing out a number from each end leaves only the pair of 4s. Since the numbers are the same, the mean is also 4 (as 4 + 4 = 8/2 = 4), but if the numbers are different, the mean will give an amount that if halfway between the two such as:

2 2 3 4 5 5

the 3 and the 4 are left and 3 + 4 = 7 which when divided by 2 is 3.5, a number in between the 3 and the 4. In even number sets, two numbers will always be left and the same approach is taken.

If there is an odd amount of numbers in a set, then there will only be one number left uncrossed, and this is the median:

1 3 5 6 7

such as in the above example where the 5 if the only number left.

How many three digits can be formed using 2 4 6 8 9?

60

You have 5 choices for the 1st digit, 4 choices for the 2nd and 3 choices for the 3rd.

Thus, 5 x 4 x 3 = 60

What is the relationship between reliability and failure rate?

MTBF = 1/failure rate R(t) = e (-t/MTBF) http://www.vicorpower.com/documents/quality/Rel_MTBF.pdf

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