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Probability
The probability of a certain event is a number expressing the likelihood that a specific event will occur, expressed as the ratio of the number of actual occurrences to the number of possible occurrences. In mathematics, it is a measure of how often an event will happen and is the basis of statistics.
14,643 Questions
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What is the probability of getting a number greater number than 2?
The answer depends on what the experiment is.
What are the chances of finding an undisturbed ecosystem?
0.
Ecosystems are disturbed by natural phenomena as those caused by human activities. You cannot have an ecosystem that is undisturbed by both.
What is the probability of pulling out one card and it being between an 8 and a king?
The probability is 4/13.
Can you have twins if your husband's mother is a twin?
The first one is fraternal twins (which are more associated with heredity) and the second one is identical twins.
However, because your husband's mother is a twin, it may put you at a slightly higher chance for a twin pregnancy. This chance would be higher if your mother or grandmother had a history of twin pregnancies.
Some variables have a strong "seasonal" variation. The word seasonal is in quotation marks because in this context it only means periodic variation rather than climatic seasons. For example, your body temperature has a 24-hour period, sales from a down town store may have a weekly period since there may be fewer office workers at weekends, ice cream sales at a seaside resort may have a seasonal variation because of a greater number of visitors in the summer. In such circumstances, looking at month to month changes in the variable are not very useful: they may simply be a result of the seasonality.
One statistical method to deal with this is to use the moving average. The data are averaged over a period whose length is the same as the periodicity of the data, and these are calculated for overlapping periods.
Thus, for data with a weekly cycle, you would calculate averages for Monday to the following Sunday, Tuesday to Monday, Wed to Tue, and so on. At each stage, you drop the first period from the previous average and add the next period at the end. These data are seasonally adjusted and are better for studying the underlying trend.
What is the probability of flipping three coins and 2 landing heads up but 1 tails up?
You have two options:
Tree diagram
or binomial
I choose binomial
3 chooses 2
3*2*1/(2) = 3
3 * .5^2 * .5 = .375
or 37.5%
Or if you want it in the exact order HHT
its .5^3 which is 12.5%
The F1 offspring of the monohybrid cross AAA x AAA are?
F1 offspring obtained by monohybrid cross of AA and AA will be Aa.
There are 2 red jacks in a deck of 52 cards. Therefore, P(red jack) is 2/52 or 1/26.
How can you improve your experimental probability?
There are a number of different things which can improve the estimate:
- select an appropriate estimation method,
- repeat the experiment more times,
- Improve the accuracy of your measurement,
- ensure that other variables are properly controlled.
What is the probability that the first card is an an ace or the second card is black?
The answer depends on whether or not the first card is replaced before the second is drawn.
Important event that occurred in z for zachariah?
Mr loomis arrives at burden valley. This adds a Second character to the story.
2/6 which equals 1/3
What is the probability that you will draw a card smaller than a 5 not including the ace?
8/52 = 2/13
(10/29)(9/28)= 0.110837438 or about 11.1%
What is the probability to have exactly 220 heads when you flip 400 coins?
Do a binomial expansion of (T + H)400.
Evaluate the 221st term for H= 1/2 and T = 1/2 and you have the answer.
There is some short cut to get that term quickly, but I've forgotten it.
A forecast that says, for instance, "there is a 10% chance of rain tomorrow," means that on 10 out of 100 days with weather conditions very similar to the conditions expected tomorrow, at least a trace of train has occurred.
Some will disagree with this answer for various reasons. For the results of research that evaluated how understanding of percentage chance of precipitation varies around the world, see "A 30% Chance of Rain Tomorrow: How Does the Public Understand Probabilistic Weather Forecasts?," available as a PDF file via the URL http://www.mpib-berlin.mpg.de/en/mitarbeiter/gigerenzer/pdfs/RainFinal.pdf .
You are given the letters m-a-t-h-i-s-n-e-a-t how many unique 4-letter arrangements are possible?
5040 is the answer... first you count up all the numbers then you find out that there is 10 letter. next you take 10*9*8*7 to get 5040. simple as that! >:)
There is a total of 126 tees since 23+19+16+21+11+19+17=126
there are 21 green tees.
Thus the probability of choosing a green tee is 21/126=1/6
When 2 dice are rolled find the probability of getting a sum of 10 or doubles?
The probability is 8/36 or 2/9
