Outcomes can be predicted mathematically using statistics or probability. To determine the probability of an event occurring, take the number of the desired outcome, and divide it by the possible number of outcomes. With statistics, an outcome is predicted based on recorded behavior.
The theoretical probability of flipping a head after tossing a coin is 1/2, as obtained from dividing one (desired outcome) by two (head plus tail). When using statistics, one would first toss the coin a number of times and record the outcome each time. If "head" appeared 19 times after flipping the coin 36 times, the probability of flipping "head" would be 19/36, or 53 percent.
The validity and precision of such predictions depends on statistical reliability. When studying the efficacy of blood pressure medication in mice, a person would want to carry out a number of trials before trying it out on humans. Predictions for effectiveness of the drug on humans would be more reliable if trials in mice produce consistent results at different times.
Statistics have also been employed to predict outcomes of football matches for betting purposes. For instance, many pundits and fans thought Brazil would win the 2014 FIFA World Cup because statistics showed it had won many times against European opponents before.
Learn MoreIn medicine, odds ratio formula is the measure of odds of association between exposures divided by the odds of the outcomes (odds ratio = (ad/bc)). The formula is used to measure the strength of absence or presence of a property in a given population.
Full Answer >The theoretical definition of probability states that if the outcomes of an event are mutually exclusive and equally likely to happen, then the probability of the outcome "A" is: P(A) = Number of outcomes that favors A / Total number of outcomes. For example, there are two possible outcomes when a coin is tossed in the air, and the probability of the coin landing on a head or a tail is equal to 0.5.
Full Answer >Population density tells you how crowded a certain area is, on average. To calculate, you need measurements of area, the population count and a calculator.
Full Answer >To calculate the number of jellybeans in a jar, count the number of jellybeans on the top layer of the jar. Then, count the number of jellybeans going down the side of the jar, and multiply that number by the number of jellybeans in the top layer to get an estimate of the number of jellybeans in the jar.
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