통계 계산기
데이터 분석 및 통계 계산을 위한 전문 도구입니다.
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.
상대 표준 편차 계산기
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.
가중 표준 편차 계산기
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.
합동 표준편차 계산기
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.
모 표준 편차 계산기
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.
표본 표준편차 계산기
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.
이상치 계산기
IQR, Z-점수 및 수정된 Z-점수(MAD) 방법으로 시각적 식별과 함께 이상치를 감지합니다.
표본 크기 계산기
신뢰 수준과 오차 한계로 설문조사 및 실험에 필요한 표본 크기를 결정합니다.
상관관계 계산기
피어슨 및 스피어만 상관계수, 공분산 및 선형 회귀 분석을 계산합니다.
백분위수 계산기
데이터 분포 시각화와 함께 백분위수, 사분위수, 십분위수 및 사분위수 범위를 계산합니다.
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.
평균 계산기
산술, 기하, 조화 평균, 중앙값, 최빈값, 절사 평균 및 RMS를 단계별 솔루션과 함께 계산합니다.
기술 통계
평균, 중앙값, 최빈값, 범위 및 사분위수를 포함한 완전한 통계 요약을 얻으세요.
확률 분포
정규, 이항 및 기타 통계 분포의 확률을 시각화하고 계산합니다.
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-점수 계산기
원시 점수를 표준화된 z-점수로 변환하고 백분위 순위를 계산합니다.
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.
분산 계산기
상세한 단계별 분석과 해석으로 데이터셋의 분산을 계산합니다.