统计计算工具
专业级数据分析和统计计算工具套件。
How the Calculator Directory Is Organized
Standard deviation is a measure of spread, variance refers to average squared deviation, and confidence intervals are range estimates around a parameter. Grouping these calculators together helps readers move from a basic descriptive metric to a broader workflow for summarizing uncertainty and variation.
| Calculator family | What it answers | Typical user |
|---|---|---|
| Dispersion | How spread out are the values? | Students, analysts, quality teams |
| Location | Where is the center of the data? | Researchers, operations teams |
| Inference | How uncertain is the estimate? | Decision-makers and report writers |
Available Calculators
Cohen's d Effect Size Calculator Helper
Use this calculator to summarize each group from raw data before computing Cohen's d. Get the mean, sample standard deviation, and sample size inputs needed for two-group effect size reporting.
Batting Average Calculator
Calculate batting average from raw hit results online. Enter plate appearance outcomes as hits and outs to get batting average plus mean, variance, standard deviation, count, and range for lineup and game-by-game analysis.
Weighted Average Calculator
Calculate the average and spread of weighted data by entering raw values or frequency-expanded repeated values. Use the results with mean, variance, standard deviation, standard error, count, min, max, and range for quick statistics checks.
T-Test Calculator Helper
Prepare the summary statistics needed before a one-sample or two-sample t-test. Built for lab analysts, classroom researchers, and QC engineers reviewing 20-100 measurements who need mean, sample standard deviation, standard error, and sample size before moving into p-value, confidence interval, or pooled standard deviation workflows.
Critical Value Calculator Helper
Prepare the summary statistics needed before looking up a z critical value or t critical value. Built for analysts, instructors, and QC engineers checking 20-100 raw measurements who need mean, sample standard deviation, standard error, and sample size before moving into p-value, confidence interval, margin of error, or t-test workflows.
P-Value Calculator Helper
Use the calculator to summarize raw sample data before computing a p-value. Get the mean, sample standard deviation, standard error, sample size, and z-score or t-test inputs needed for hypothesis testing, confidence intervals, and significance checks.
Margin of Error Calculator
Calculate the mean, sample standard deviation, and standard error from raw data online to support margin of error checks, confidence interval setup, and sample size planning.
Min Max Calculator
Calculate the minimum and maximum of your dataset from raw values online. Instantly get min, max, range, mean, variance, standard deviation, and standard error in one workflow.
Range Calculator
Calculate the range of your data from raw values online. Instantly get minimum, maximum, range, mean, variance, standard deviation, and standard error in one workflow.
Grade Average Calculator
Calculate a grade average from raw scores online. Enter test, quiz, homework, or assignment grades to get the mean plus standard deviation, variance, standard error, count, min, max, and range in one workflow.
Mean and Standard Error Calculator
Calculate the sample mean and standard error from raw data online. Enter your values to get the average, sample standard deviation, standard error of the mean, variance, count, min, max, and range in one workflow.
Mean and Standard Deviation Calculator
Calculate mean and standard deviation from raw data online. Enter your values to get the average, sample standard deviation, standard error, variance, and range in one workflow.
Mean and Variance Calculator
Calculate mean and variance from raw data online. Enter your values to get the average, sample variance, population variance, standard deviation, standard error, and range in one workflow.
Standard Deviation and Standard Error Calculator
Calculate standard deviation and standard error from raw data online. Enter your values to get sample SD, population SD, variance, mean, count, min, max, and range in one workflow.
Confidence Interval Standard Deviation Calculator
Calculate mean, sample standard deviation, and standard error from raw data online. Use the results for confidence interval setup, spread checks, and faster statistical interpretation.
Standard Error of the Mean Calculator
Calculate the standard error of the mean (SEM) from raw sample data online. Enter your values to get sample standard deviation, sample size, mean, and SEM for faster confidence interval and hypothesis test work.
相对标准偏差计算器
Calculate the relative standard deviation (RSD) of your dataset online. Enter raw values or provide the mean and standard deviation to instantly compute RSD% and coefficient of variation.
加权标准差计算器
Calculate the weighted standard deviation for your data set with our free online calculator. Enter your values and weights to get instant results, including the formula and step-by-step calculations.
合并标准差计算器
Calculate the pooled standard deviation for two or more groups instantly. Enter your sample sizes, means, and standard deviations to get precise results with step-by-step explanations.
总体标准差计算器
Calculate the population standard deviation of your dataset instantly. Eliminate manual math errors and quickly determine the exact spread of your entire population for confident analysis.
样本标准差计算器
Compute the sample standard deviation of any data set instantly. Accurately measure your sample's data spread to make confident statistical inferences without manual formula errors.
异常值检测器
使用IQR法、Z分数法和修正Z分数（MAD）法检测异常值，可视化标识结果。
样本量计算器
确定调查和实验所需的样本量，支持置信水平和误差范围设置。
相关性计算器
计算皮尔逊相关系数、斯皮尔曼等级相关系数、协方差和线性回归分析。
百分位数计算器
计算百分位数、四分位数、十分位数和四分位距，可视化展示数据分布。
Mean, Variance, and Standard Deviation Calculator
Calculate mean, variance, and standard deviation from raw data online. Enter your values to get the average, sample or population variance, standard deviation, standard error, count, min, max, and range in one workflow.
Mean and Variance Calculator
Calculate mean and variance from raw data online. Enter your values to get the average, sample variance, population variance, standard deviation, standard error, and range in one workflow.
均值计算器
计算算术平均数、几何平均数、调和平均数、中位数、众数、截尾均值和均方根，提供分步解答。
描述性统计
获取完整的统计摘要，包括均值、中位数、众数、极差和四分位数。
概率分布
可视化并计算正态分布、二项分布等统计分布的概率。
Test Score Standard Deviation Calculator
Calculate standard deviation for test scores from raw results online. Enter exam, quiz, or assessment scores to get mean, sample or population SD, variance, standard error, count, min, max, and range in one workflow.
Z-Score Standard Deviation Calculator
Prepare the mean and standard deviation inputs needed for z-score work from raw data. Built for teachers checking class scores, QC engineers reviewing 20-100 part measurements, and analysts moving from a dataset summary into z = (x - mean) / SD, percentile, or outlier checks.
Z分数计算器
将原始分数转换为标准化Z分数，计算百分位数排名。
Sample Variance Calculator
Calculate sample variance from raw data online. Use sample mode to get s^2 with mean, standard deviation, standard error, and range.
Population Variance Calculator
Calculate population variance from raw data online. Enter your full population values to get sigma^2, population standard deviation, mean, count, min, max, and range in one workflow.
Variance and Standard Deviation Calculator
Calculate variance and standard deviation from raw data online. Enter your values to get sample variance, population variance, sample SD, population SD, mean, standard error, count, min, max, and range in one workflow.
方差计算器
计算数据集的方差，提供详细的分步计算过程和结果解读。