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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.
36,756 Questions
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 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.
Could the range ever be greater than the largest number of a data set?
Yes, if the lowest data value is negative.
What is the probabilty of drawing a red ten from a deck of 52 cards?
The probability of drawing a red 10 from a standard deck of 52 cards is 2 in 52, or about 0.03846.
The Ten of Diamonds and the Ten of Hearts.
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.
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 seven digit numbers can be made from numbers 123456789 but no repetitions is allowed?
The first digit can be any one of 9 choices. For each of these . . .
The second digit can be any one of the remaining 8 choices. For each of these . . .
.
.
.
The seventh digit can be any one of the remaining 3 choices.
Total possibilities = (9 x 8 x 7 x 6 x 5 x 4 x 3) = 181,440
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.)
In a set of numbers ordered from the least to the greatest the number in the middle is called what?
Median is that.
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.
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
What is the procedure for iridology assessment?
The iris reflects what is happening throughout the body via nerve conduction. The interpretation of patterns, rings, color markings, fibers, structures, and changes in the pupil and iris assess health.
