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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 3 digit combinations can be found using odd numbers 1 3 5 7 9?
There are 24 combinations using each digit only once per combination: 135 137 153 157 173 175 315 317 351 357 371 375 513 517 531 537 571 573 713 715 731 735 751 and 753.
What is the IQR of 68 75 74 85 93 68 80 68 76 81 79?
9.5 is the interquartile range of those numbers.
What is the chance that that 2 flipped coins both come up heads?
The probability that 2 flipped coins both come up heads is 0.52 or 0.25
What do you the point at which two lines meet called?
Point of Intersection.
Source: I'm in Gr.9 math.
A GRE raw Score is the number of questions you answered correctly.
What is the number of ways of forming 6 digit number whose sum of digits is even?
I look at it this way:
-- There are 90,000 numbers with five digits. (100,000 minus 10,000 with less than 5 digits)
-- If the sum of the first 5 digits is odd, it can be made even by using 1, 3, 5, 7, or 9
for the 6th digit ... 5 choices.
-- If the sum of the first 5 digits is even, it remains even by using 2, 4, 6, 8, or 0
for the 6th digit ... 5 choices.
-- So, for any one of the 90,000 five-digit numbers, there are 5 choices for the 6th digit
that result in an even sum of all six.
-- So, there must be 450,000 suitable 6-digit numbers.
How many faces edges corners does a octahedron have?
It depends on the exact shape. An octahedron is a shape with eight faces. It can be a heptagonal pyramid (8 vertices, 14 edges), or a hexagonal prism (12 vertices, 18 edges), square dipyramid (6 vertices, 12 edges) are some examples. There are more.
Could the range ever be greater than the largest number of a data set?
Yes, if the lowest data value is negative.
In a set of numbers ordered from the least to the greatest the number in the middle is called what?
Median is that.
To the nearest number what is the mean number of letters per word in this sentence?
4. (67 letters divided by 16 words = 4.4667 letters per word.)
When rolling two dice what is the probability of rolling more than nine?
There are 36 different combinations when rolling two dice, of these, there is a 10/36 = 5/18 (27.78%) chance of rolling combined total of 9 or more, or a 6/36 = 1/6 (16.67%) chance of rolling a combined total of 10 or more
How are the digits in a number grouped?
In much of the world, in groups of three from the decimal point outwards (in both directions). On the integer side the groups may be separated by commas (or full stops).
In South Asia, though, integers are grouped in three and then in twos - again moving to the left from the decimal point.
Significance of difference between two correlation?
To find the significance of a difference between two correlations:
1. Convert each to Fisher's Zr using: .5*(ln(1+r)-ln(1-r)) or just arctanh(r)
2. Use the equation: (Zr1 - Zr2)/sqrt((1/(n1-3))+(1/(n2-3))), this will give you a Z
3. Look-up the Z on a table or from a calculator or in a computer to get the p-value
256
The cube has 6 faces and each face is .?
Each face of a cube is a square.
Each face of a cube is a square.
Each face of a cube is a square.
Each face of a cube is a square.
