Calculadora de Probabilidade/Estatística

Resolver problemas de probabilidade/estatística passo a passo

Esta calculadora online resolve uma ampla gama de problemas de probabilidade/estatística. Ele calcula a média, variância, percentil, encontra probabilidades de várias distribuições e muito mais.
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The Probability and Statistics Calculator is your go-to resource for performing a variety of statistical calculations. It contains a collection of calculators designed to solve complex problems, helping you improve your knowledge of probability and statistics.

How to Use the Probability and Statistics Calculator?

  • Select a Calculator

    Start by selecting the specific calculator that corresponds to your statistical or probability problem. Each calculator is designed to perform different types of calculations.

  • Input

    Enter the relevant data into the provided fields.

  • Calculation

    Click the "Calculate" button to perform the calculation. The calculator will process your input and provide you with the result.

  • Result

    Examine the output produced by the calculator. It may include statistical measures, probabilities, graphs, or other relevant information, depending on the calculator you've selected.

What Are Probability and Statistics in Math?

Probability and statistics are important branches of mathematics, focusing on the study, interpretation, and understanding of both data and uncertainty.


Probability, at its core, is an area of mathematics where uncertainty and randomness are carefully studied. This field revolves around the art of measuring the chances of events or outcomes occurring in different scenarios. Within probability theory, events are typically depicted as subsets of a sample space, with probabilities assigned to these events to convey their expected occurrence.

Key concepts in probability include:

  • Probability Space: A probability space consists of a sample space (all possible outcomes) and a probability measure (assigning probabilities to events in the sample space).
  • Random Variables: Random variables are mathematical representations of uncertain quantities. They can take different values with corresponding probabilities.
  • Probability Distributions: Probability distributions describe the probabilities of different outcomes for a random variable. Common distributions include the normal distribution, binomial distribution, and Poisson distribution.
  • Conditional Probability: Conditional probability calculates the probability of an event occurring given that another event has already occurred.
  • Independence: Events are considered independent if the occurrence or non-occurrence of one event does not affect the probability of another event occurring or not occurring.


Statistics involves collecting, studying, interpreting, organizing, and presenting data, all with the goal of obtaining significant information and making informed judgments based on observed data. This field serves as a tool for summarizing information, identifying underlying patterns, and extrapolating knowledge about broader populations or phenomena through the analysis of representative sample data.

Key concepts in statistics include:

  • Descriptive Statistics: Descriptive statistics include methods for summarizing and presenting data. Common descriptive measures include mean (average), median, mode, range, and standard deviation.
  • Inferential Statistics: Inferential statistics use sample data to make inferences about the larger population. Methods such as hypothesis testing, confidence intervals, and regression analysis fall into this category.
  • Sampling: Sampling is the process of selecting a subset (sample) from a larger group (population) in order to draw conclusions about the entire population.
  • Statistical Distributions: Understanding the properties of statistical distributions is critical to statistical inference. Common distributions include the normal distribution and the t-distribution.
  • Statistical Tests: Statistical tests are used to evaluate whether observed differences or relationships between variables are statistically significant or due to chance.

What Calculators Does eMathHelp Offer?

Arithmetic Mean

This calculator allows users to easily find the average value of a series of numbers by summing them up and then dividing by their count. It's an essential tool for basic statistics.

Beta Distribution

This is a versatile calculator for those studying advanced statistics. It finds some measures and cumulative probabilities for the beta distribution.

Binomial Distribution

Helpful for probabilistic studies, this calculator determines the likelihood of a given number of successes in a specific number of trials with a constant success rate.

Box and Whisker Plot

This is a graphical tool that demonstrates the distribution of data, showing the median, quartiles, and possible outliers, helping to understand the skewness and dispersion of the data.

Exponential Distribution

Used primarily in reliability analysis and survival studies, it calculates the probability of events over continuous time intervals.

Geometric Distribution

For those examining a series of Bernoulli trials, this tool predicts the trial number where the first success might occur.

Geometric Mean

This calculator finds the nth root of the product of $$$n$$$ numbers.

Harmonic Mean

Ideal for rates or ratios, this calculator determines their average by taking the reciprocal of the arithmetic mean of the reciprocals.

Hypergeometric Distribution

Useful in sampling studies, it calculates the probability of successes without replacement from a finite population.

Interquartile Range (IQR)

This tool measures variability, calculating the range between the first and third quartiles, revealing data spread.

Linear Regression

Offering insight into trends, this calculator determines the best-fitting line for paired data, which is useful for forecasting and analysis.

Lower Quartile

By identifying the 25th percentile of the data, it provides insight into the lower part of the data.

Margin of Error

Essential in survey results and polls, it quantifies the level of uncertainty in statistics, offering a range in which the true population parameter lies.


This calculator quickly identifies the central value in a data set, giving a true midpoint even when outliers are present.


Useful in market research and social sciences, it pinpoints the value or values that appear most frequently in a data set.

Normal Distribution

It calculates probabilities related to the bell curve, essential for various applications.


In hypothesis testing, this calculator evaluates the statistical significance, determining the strength of evidence against a null hypothesis.

Pearson Correlation Coefficient

Analyzing linear relationships between two variables, this tool measures their strength and direction, aiding in predictive analytics.


This is a tool that offers a relative ranking, showing where a particular score stands compared to others in a data set.

Percentile and Class Rank

Designed mainly for educational metrics, it ranks a student's score relative to their peers or a specific distribution.

Sample and Population Coefficients of a Variation

This tool measures the relative variability of data, offering insight into the stability of the data regardless of the mean.

Sample and Population Covariances

Determining how two sets of data change together is critical to understanding the relationships between variables.

Sample and Population Standard Deviation

A fundamental tool in statistics, it quantifies the amount by which individual data points deviate from the mean.

Sample and Population Variance

By squaring standard deviations, this calculator provides insight into data dispersion in a set or population.

Upper Quartile

Giving a perspective on the upper half of the data, it determines the 75th percentile or the median of the upper half.


Indispensable in standardizing scores, this tool measures how many standard deviations a value is from the mean.

5-Number Summary

Providing a complete overview of the data, it gives the minimum, lower quartile, median, upper quartile, and maximum, making it easy to interpret the data.


What does the Probability and Statistics Calculator offer?

It offers a wide collection of calculators to perform different statistical and probabilistic computations. Whether you're dealing with elementary statistics or advanced data analysis, this calculator has got you covered. Whether you are dealing with elementary statistics or advanced data analysis, this calculator will help you.

How is the Statistics Calculator different from the probability calculator?

The Statistics Calculator focuses primarily on data analysis and descriptive statistics. In contrast, a Probability Calculator specializes in predicting the likelihood of specific outcomes, such as the likelihood of three certain events occurring simultaneously.

How accurate is the Probability and Statistics Calculator?

The calculator is created using advanced algorithms to ensure the accuracy and correctness of all your calculations.