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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
Would you give 5 examples of quantitative measurements?
5 examples of quantitative measurement are:
- Weight of apples.
- Dollars in bank accounts.
- Length of bolts.
- Number of students in classrooms.
- Number of cars in a parking lot.
What is the difference between retesting and regression testing?
Retesting means testing the functionality or bug again to ensure the code is fixed. If it is not fixed, defect needs to be re-opened. If fixed, defect is closed.
Regression testing means testing your software application when it undergoes a code change to ensure that the new code has not affected other parts of the software.
What does find the size of the sample space mean?
A concept in probability theory which considers all possible outcomes of an experiment, game, and so on, as points in a space.
1 - the chance to draw 2 jacks - the chance to draw no jacks leaves you with the chance to draw just one by elimination.
1 - (1/3)*(1/3) - (2/3)*(2/3)
1 - 1/9 - 4/9
1 - 5/9
4/9
A fair coin is tossed 5 times What is the probability of exactly 1 head?
First, you find the probability of picking 1 in 5 disregarding order (combination).
5 C 1 = 5/1 = 5
Then you divide that by the possible number of outcomes which is 25.
5/ 2^5= .0195
What are all possible three digit numbers using numbers 0-1-2-3-4-5-6-7-8-9?
Total number of possible 3-digit numbers = 9!x10!10!
How many of the words for the numbers 1 through 10 have 3 letters?
When you spell out the words for numbers 1-10 four of the numbers have three letters. (one two six ten)
All the combinations you can make out of 1234567890 with 2 numbers?
If there are no restrictions on the 'combinations' then there are ten choices for the first digit and ten for the second: 10 x 10. (This implies possibilities such as 22 and 77.)
If the digits must be different in each combination then the number of combinations taking two at a time from ten is C(10,2) = 10!/( 2! ( 10 - 2 )! ) = 45.
It's a value that is much different from the rest of the values. For example, if you were averaging the ages of all of the kids in a kiddy pool, and there is one adult in there - the adult's age would be considered an "outlier". Usually the outliers are discarded before measures of central tendencies are used.
1, 2, 8, 7, 5, 10, 200
200 Would be the outlier in this case.
An absolute mean is a mean of the absolute magnitude of a function with both positive and negative values.
It means to physically mistreat someone. Often roughly.
E.g: The kidnapper manhandled the boy. man·han·dle(mnhndl) tr.v. man·han·dled, man·han·dling, man·han·dles1. To handle roughly.
2. To move or handle by manpower alone.
manhandle - handle roughly; "I was manhandled by the police" palm, handle - touch, lift, or hold with the hands; "Don't handle the merchandise"
How man 7 digit combinations can be made using numbers 0 through 9?
10^7 if the repetition of digits is allowed.
9*8*7*6*5*4*3 , if the repetition of digits is not allowed.
If a die is rolled once what is the probability of rolling a 3 or 4?
Since there are two desired outcomes out of six - the probability becomes 2/6 or 1/3.
I'd say it is rather 2/6 or 1/3...
How to get constant k given alpha and beta?
multiply them together. u mean alpha and beta as x and y right?
