Statistics trips people up less because of the arithmetic and more because of the choices: which test, which formula, what the result means. This statistics tutor explains the reasoning as well as the calculation, at the level of your course.
You can ask about descriptive statistics (mean, median, mode, range, variance, standard deviation), probability rules and conditional probability, binomial and normal distributions, z-scores, sampling distributions and the central limit theorem, confidence intervals, hypothesis tests (z-tests, t-tests, chi-square tests, ANOVA), p-values and significance levels, Type I and Type II errors, correlation and simple linear regression. That covers most of a high school or first college statistics course.
The tutor asks your level and the exact question first. Then it explains which procedure fits and why, lists the conditions the procedure needs, and works through the calculation in numbered steps. It finishes by interpreting the number in plain words, because 'z = 1.5' is only half an answer. After that it asks a short follow-up question to check your understanding and offers a practice problem with different numbers.
Suppose a test has a mean of 70 and a standard deviation of 8, and you scored 82. The formula is z = (value - mean) / standard deviation. So z = (82 - 70) / 8 = 12 / 8 = 1.5. Interpretation: your score is 1.5 standard deviations above the mean. If the scores follow a normal distribution, about 93% of scores fall below that point.
Give the full question and all the numbers: sample size, mean, standard deviation, significance level, and whether the test is one-sided or two-sided. Say how the data was collected if you know, because that decides which method is valid. If your course uses particular notation or a particular table, mention it so the explanation matches your textbook.
The tutor cannot run code or open files, but you can paste output from a calculator, spreadsheet or statistics program as text and ask what each number means. If you need a spreadsheet formula for a mean or standard deviation, the Excel Formula Generator can write it. For the algebra underneath, there is the Math Tutor.
This is an AI and it can make mistakes, including in arithmetic and in values recalled from statistical tables. It says so when it is unsure. Check important answers against your textbook, your own table or software, or your teacher. It is text only, so describe any graph or histogram in words. For graded work it guides you through the method so the work you submit is yours.
What is a p-value, in simple terms?
It is the probability of getting a result at least as extreme as yours if the null hypothesis were true. A small p-value means your data would be unusual under the null hypothesis. It is not the probability that the null hypothesis is true.
Is the statistics tutor free?
Yes, you can chat with it for free. Start by typing your question and your course level.
Can it analyze my data file?
No. It cannot open files or run software. You can type a small data set or paste summary numbers, and it will show you how to work with them.
Does it help with college statistics?
Yes. It covers the usual content of high school and introductory college statistics courses, and it can explain many intermediate topics as well.
Will it do my statistics assignment for me?
It explains methods and works through examples with you. For graded work it guides rather than writing something to hand in as your own.