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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 can you avoid systematic errors?
Taking a lot of careful precautions.
- Design the sample (if any) with care so that there are no systematic sources of bias,
- look for and eliminate [as far as is possible] any external factors that might affect the experiment,
- Calibrate all measuring equipment carefully,
- Carry out the experiment with double-blind procedures so that no single person has complete knowledge of all the factors until all data have been collected. For example, a person giving a patient a placebo may unconsciously send out signals to the patient who may then respond differently.
Explain appraisals in sampling are estimates and predictions only?
ü Evaluations , assessments involving sampling must not be considered as final since it may be faulty or may contain error
Introduction to statistical theory by Sher Muhammad CH?
Introduction to statistical theory by Sher Muhammad CH is used at the University of Albany. It is available in book format as well as e-book format.
What are the units you use for measuring a moment?
If you mean a brief moment of time: seconds.
If you mean momentum: this is mass x velocity, so the units are kg x meters / seconds
If you mean a brief moment of time: seconds.
If you mean momentum: this is mass x velocity, so the units are kg x meters / seconds
If you mean a brief moment of time: seconds.
If you mean momentum: this is mass x velocity, so the units are kg x meters / seconds
If you mean a brief moment of time: seconds.
If you mean momentum: this is mass x velocity, so the units are kg x meters / seconds
How many 4digital numbers can be formed using the numbers 123?
There are 3 choices for each of the 4 digits, so the total number of possibilities is
3 x 3 x 3 x 3 = 81 different 4-digit numbers.
How do you calculate probability values?
This is an extremely general question. Perhaps an example of the type of problem you need help with would be better.
What is the most reliable sampling method?
From what i have learned in my math class a census is the most reliable method but is not always applicable so simple random method is the next best.
How many 6 digit combinations can be made from digits 0 to 9?
10C6 = 10*9*8*7/(4*3*2*1) = 210 combinations.
What kind of graph would you use to show the scores?
When putting the scores in, you use the normal distribution graph, which is the best start.
What is the interdecile range in the set of numbers?
The first decile (D1) is a number such that one tenth of the observations are smaller and nine tenths are larger.
The ninth decile (D9) is a number such that nine tenths of the observations are smaller and one tenth are larger.
The interdecile range is D9 - D1
Prominent = outstanding, distinctive, set above the rest
eg Winston Churchill was a prominent politician who led Great Britain to victory (with help from Russia, US, Canada, France, etc) in WWII
Standing out, or projecting, beyond the line surface of something; jutting; protuberant; in high relief; as, a prominent figure on a vase.
1. Think "What will the result be if I do this?"
2. Have other options and decide with makes you happiest.
3. Make a list in your mind about whats good and whats bad about the decision you're about to make.
4. Make sure you're ready for it.
5. You will have you're result!
What is the difference between error and problem?
Error-when
we are doing something wrong......this is errer.....
and How to correct it......is our problem.
What is the most likely roll in dice?
Assuming you are only rolling one die, then each of the six numbers (1,2,3,4,5,6) has an equal chance (1 sixth) of landing face up.
What is the probability of rolling a sum of a 6 on two dice?
On two fair 6-sided dice: 5 out of 36 = 13.89%. Consider the two dice unique. Maybe one is black with white spots, and the other is white with black spots. There are 36 possible outcomes. You can make a table of the sums, and see that five of the outcomes have a sum of 6. Here they are:
- 1+5, 2+4, 3+3, 4+2, 5+1
