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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 do you use binomial probability to assess if an outbreak of an illness has occurred or not?

If the illness is infectious then you cannot use the binomial distribution because the incidences of illness are no longer independent events, so that the assumptions required for the binomial distribution are not satisfied.

Suppose the illness is not infectious and the "normal" rate of illnesses is p. Then in a group of size n, the number of units suffering has a B(n, p) distribution. You can then determine a critical region at an appropriate level of significance and test the number of victims against that.

How do you find the rrange of A set of numbers?

Let the upper bound of the set (the biggest element or upper limit) = A

Let the lower bound of the set (the smallest element or lower limit) = B

Then, the range is A - B

In a finite set the range will be the largest minus the smallest elements. But with infinite sets, (specifically, open sets), one or both extrema may not be members of the set.

How many different 4 number combintions are there using the numbers 1-8 but each number can only appear one time in each combination no repeats of numbers it has to be like 1234 or 1235 not 1111?

If the order makes a difference, then there are

(8!) / (4!) = (8 x 7 x 6 x 5) = 1,680possibilities.

If the order doesn't matter ... "1234" is the same thing as "1324" ... then there are

(8!) / (4! x 4!) = 70 possibilities

What does mean deviation tells us about the data?

It is a measure of how variable the data is. The average distance from the average.

How many 2's are in a deck of 52?

There are four 2s in a standard deck of playing cards.

What is the value of a single shot 20 gauge made in 1932?

Typically old single shots bring little at market. Very few were made ornate, and most were produced to provide a gun at the lowest possible cost. Even more well known makers, won't bring a lot of money. Again, it depends on maker, model, condition. If original and in good condition, most can be had $60 - $125

What is a mode of a set of numbers?

the mode is the number that occurs the most (there can be more than one) "consider the following" mode sounds like most mode most mode most see

How can you find the circumference of a circle?

You must know the circle's radius - the formula is 2*pi*r or approximately 6.28319*r.