統計計算ツール
データ分析と統計計算のためのプロフェッショナルグレードのツール。
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.
相対標準偏差計算機
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.
重み付き標準偏差計算機
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.
プール標準偏差計算機
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.
母集団標準偏差計算機
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.
標本標準偏差計算機
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.
外れ値計算機
IQR法、Zスコア法、修正Zスコア（MAD）法を使用して外れ値を検出し、視覚的に識別します。
サンプルサイズ計算機
信頼水準と許容誤差を用いて調査・実験に必要なサンプルサイズを決定します。
相関計算機
ピアソン相関係数、スピアマン相関係数、共分散、線形回帰分析を計算します。
パーセンタイル計算機
パーセンタイル、四分位数、十分位数、四分位範囲をデータ分布の視覚化と共に計算します。
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.
平均計算機
算術平均、幾何平均、調和平均、中央値、最頻値、トリム平均、RMSをステップバイステップで計算します。
記述統計
平均、中央値、最頻値、範囲、四分位数を含む完全な統計要約を取得します。
確率分布
正規分布、二項分布、その他の統計分布の確率を視覚化して計算します。
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スコア計算機
生データスコアを標準化されたZスコアに変換し、パーセンタイルランキングを計算します。
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.
分散計算機
詳細なステップバイステップの分解と解釈でデータセットの分散を計算します。