QuizeStatistics Solver with Steps
A free stats problem solver that shows its work. Type, paste or snap any probability, z-score, confidence interval or hypothesis test problem, and see the formula, the math and what it means.
- 10free answers a day
- Everyformula and step shown
- APand college stats
Updated
Solve a statistics question
Type it, paste it, or upload a photo. You get the answer, every step, and the idea behind it.
What is a statistics solver?
A statistics solver works out stats problems and explains each step. QuizeGpt is an AI statistics solver that goes further: it picks the right formula or test, shows every number you plug in, and ends with one sentence on what the answer means. You learn the method, not just the number.
- Type a problem, paste a screenshot, or upload a photo of a data table.
- Get the answer with the formula, each step and what it means, in plain words.
- Ask a follow-up if a step doesn't make sense.
What the statistics problem solver can do
From your first mean and median to hypothesis tests and regression, here's what this statistics homework solver handles, and how it explains each one.
| Statistics topic | What you get |
|---|---|
| Mean, median and mode | Finds each one and says which fits the data best, like the median when there are outliers. |
| Standard deviation and variance | Works each step and says when to divide by n − 1 for a sample. |
| Probability | Counting, and, or, not, conditional probability and tree diagrams. |
| Binomial and normal distributions | Picks the right distribution and shows the formula or the table look-up. |
| z-scores and z-tables | Turns a value into a z-score and finds the area to the left, right or between. |
| Sampling distributions | Standard error and the Central Limit Theorem in plain words. |
| Confidence intervals | Finds the margin of error and the interval, then explains what it means. |
| Hypothesis tests | z, t, chi-square and proportion tests: hypotheses, test statistic, p-value and decision. |
| Regression and correlation | Finds the line of best fit and r, and explains slope and r² in context. |
Statistics solver with steps: worked examples
This is what the stats solver gives you. Each step names the formula and why it fits.
Find the sample standard deviation of 2, 4, 4, 4, 5, 5, 7, 9.
- Mean: 40 ÷ 8 = 5.
- Square each distance from 5 and add them: 9 + 1 + 1 + 1 + 0 + 0 + 4 + 16 = 32.
- It's a sample, so divide by n − 1 = 7: 32 ÷ 7 = 4.57. Take the square root.
Answer: s ≈ 2.14
Test scores are normal with a mean of 70 and an SD of 10. What percent scored above 85?
- z = (85 − 70) ÷ 10 = 1.5
- The z-table gives 0.9332 to the left of z = 1.5.
- Above means the right side: 1 − 0.9332 = 0.0668.
Answer: About 6.7%
A sample of 36 students studies 12 hours a week on average, with σ = 3. Find the 95% confidence interval.
- For 95%, z* = 1.96. Standard error: 3 ÷ √36 = 0.5.
- Margin of error: 1.96 × 0.5 = 0.98.
- 12 − 0.98 = 11.02 and 12 + 0.98 = 12.98.
Answer: (11.02, 12.98) hours
You flip a fair coin 5 times. What's the chance of exactly 3 heads?
- It's binomial: n = 5 flips, k = 3 heads, p = 0.5.
- Ways to pick which 3 flips are heads: C(5, 3) = 10.
- P = 10 × 0.5³ × 0.5² = 10 ÷ 32
Answer: 0.3125, or 31.25%
Try it without signing in
Pick a sample problem, then drag a box over it to snap it, just like the Chrome extension does on your homework page.
Find the mean of 4, 8, 6, 10, 7
- 6
- 7
- 8
- 35
Drag a box over the question, just like in the extension. On a phone, tap it. Or press Snap & solve.
- Add the values: 4 + 8 + 6 + 10 + 7 = 35
- Count them: 5 values
- Mean = 35 ÷ 5 = 7
You roll a fair six-sided die. What is the chance of rolling a number greater than 4?
- 1/6
- 1/3
- 1/2
- 2/3
Drag a box over the question, just like in the extension. On a phone, tap it. Or press Snap & solve.
- Numbers greater than 4: 5 and 6, so 2 outcomes
- Total outcomes: 6
- P = 2/6 = 1/3
A left-tailed test at α = 0.10 gives z = −4.05. The critical value is −1.28. What is the decision?
- Reject H₀
- Fail to reject H₀
- Accept H₀
- You need the p-value first
Drag a box over the question, just like in the extension. On a phone, tap it. Or press Snap & solve.
- In a left-tailed test, reject H₀ if z is below the critical value.
- −4.05 is less than −1.28, so z falls in the rejection region.
- Decision: reject H₀.
Sample questions with saved answers. The extension works on any question you snap. Want the full tour? Try the interactive demo.
Normal distribution: the 68–95–99.7 rule
So much of stats leans on the bell curve. In a normal distribution, most values sit close to the mean, and the rule tells you how close. Watch the bands fill in.
- About 68% of values are within 1 standard deviation (σ) of the mean.
- About 95% are within 2 standard deviations.
- About 99.7% are within 3. A value beyond that is very unusual.
What a z-score tells you
- z = (x − μ) ÷ σ: how many SDs a value is from the mean.
- z = 2 is high, but about 2.5% of values are even higher.
Reading a z-table
- Most tables give the area to the left of z.
- For "above", subtract from 1. For "between", subtract two areas.
How to do a hypothesis test, step by step
Hypothesis tests are where most stats students get stuck. Every test follows the same five moves. Here's a two-sample z-test, the way the statistics solver walks through it.
Do regular-coffee drinkers drink less per day than decaf drinkers? Regular: n = 54, mean 4.59 cups, σ = 1.21. Decaf: n = 49, mean 5.64 cups, σ = 1.40.
- Hypotheses: H₀: μ₁ ≥ μ₂ and H₁: μ₁ < μ₂. "Less than" makes it left-tailed.
- Pick the test: both σ's are known, so it's a two-sample z-test.
- Test statistic: SE = √(1.21²/54 + 1.40²/49) = 0.259, so z = (4.59 − 5.64) ÷ 0.259 = −4.05.
- Critical value: left-tailed at α = 0.10 gives −1.28.
- Decision: −4.05 is below −1.28, so reject H₀.
Answer: Reject H₀. Regular-coffee drinkers drink less per day.
Using a p-value instead? The p-value here is far below 0.10, which gives the same decision. Reject H₀ when the p-value is less than α.
How to solve statistics problems, step by step
Whether you use a solver or not, this five-step method works on most stats problems.
- Step 1
Name the problem type
Describe the data, find a probability, estimate, or test a claim?
- Step 2
Pick the formula or test
Mean or proportion? σ known or not? One sample or two? That picks the tool.
- Step 3
Check the conditions
Random sample? Big enough n? Roughly normal? Tests need these to hold.
- Step 4
Calculate carefully
Plug in, keep 3 or 4 decimals, and round only at the end.
- Step 5
Say what it means
Finish with one sentence in context, like "we're 95% confident the mean is…".
How to check a statistics answer
Any tool can slip, and so can you. These quick checks catch most mistakes, and they're good habits for the exam.
Is it in range?
A probability is between 0 and 1. A standard deviation is never negative. r is between −1 and 1.
Does it fit the data?
The mean should sit inside the data. An interval should contain the sample mean.
Does the sentence match?
If you rejected H₀, your sentence should back H₁. If not, say there isn't enough evidence.
Common statistics mistakes to avoid
Dividing by n for a sample
A sample standard deviation divides by n − 1. A whole population divides by n.
Using z when you need t
If you only know the sample SD (s), not σ, use a t-test with n − 1 degrees of freedom.
Getting the tail wrong
"Less than" is left-tailed, "more than" is right-tailed, and "different" is two-tailed.
"Accepting" H₀
You either reject H₀ or fail to reject it. Failing to reject doesn't prove H₀ is true.
MyStatLab and statistics homework help on any page
Looking for MyStatLab answers or MyLab Statistics answers? There's no answer key that fits, because MyStatLab gives each student different numbers. The QuizeGpt Chrome extension does something better: press Ctrl/⌘+Shift+U, drag a box around your own problem, and the steps show up in a side panel.
✓ Great for
- MyStatLab homework where help is allowed.
- ALEKS statistics learning topics and practice sets.
- Review after you submit, before the exam.
✕ Not for
- Quizzes, tests and exams. Keep it closed.
- ALEKS Knowledge Checks and proctored tests.
Need the algebra behind a formula? Try the algebra solver. Business stats? The accounting solver covers the money side. Doing stats online? See how QuizeGpt explains ALEKS statistics topics and McGraw Hill Connect questions. Exam soon? Read why testing yourself works.
Is the statistics solver free?
Yes. You get 10 free answers a day. Upgrade only if you need more.
Plus
$7.99 / month
Billed monthly. Also $4.99 a week, $29.99 a semester, or $59.99 a year.
- Unlimited answers (fair use)
- Full step-by-step explanations
- Checked answers for harder questions
✓ Cancel anytime. 7-day money-back guarantee on your first payment.
Stats help: QuizeGpt vs other tools
Thinking of other apps for statistics? Here's how they stack up.
QuizeGpt vs Quizlet
Quizlet helps you memorize. QuizeGpt explains any question you snap.
- Solves any question
- QuizeGpt: Yes — any page, PDF, or imageQuizlet: Limited
- Step-by-step help
- QuizeGpt: Yes, with confidence levelQuizlet: No
- Free plan
- QuizeGpt: Yes — 10 answers/dayQuizlet: Yes (with upsells)
QuizeGpt vs SnapGPT
Both snap a question. QuizeGpt is built to help you learn it.
- Shows how sure it is
- QuizeGpt: YesSnapGPT: Not highlighted
- Hints and why it's wrong
- QuizeGpt: YesSnapGPT: Varies
- Stays off graded tests
- QuizeGpt: Yes — by designSnapGPT: Not stated
QuizeGpt vs Chegg
Chegg has a big bank of answers. QuizeGpt explains your exact question in seconds.
- Speed
- QuizeGpt: SecondsChegg: Minutes to hours (expert Q&A)
- Works on any site
- QuizeGpt: YesChegg: No — its own site/app
- Free plan
- QuizeGpt: Yes — 10 answers/dayChegg: Limited / trial
Statistics solver FAQ
Is there a free statistics solver?
Yes. QuizeGpt is a free statistics problem solver with steps. You get 10 answers a day for free, each with the formula, the math and what the answer means. No card is needed.
What statistics problems can it solve?
Mean, median, standard deviation, probability, binomial and normal distributions, z-scores, confidence intervals, hypothesis tests and regression. It works for intro stats, AP Statistics and college stats.
Is it a statistics AI solver with steps?
Yes. It's an AI statistics solver that shows every step: the formula, the numbers you plug in, and one sentence on what the result means in the problem.
Can it do hypothesis tests?
Yes. It writes H₀ and H₁, picks the test (z, t, chi-square or proportion), finds the test statistic and p-value or critical value, and states the decision in words.
Does it read data tables, charts and z-tables?
Yes. Snap a data table, histogram or scatterplot, and it reads the numbers as part of the question. It can also find z-table areas for you and show where they come from.
Does it work with MyStatLab and MyLab Statistics?
Yes, for homework where help is allowed. The Chrome extension works on MyStatLab, MyLab Statistics, McGraw Hill Connect, ALEKS and any other page. Keep it closed on quizzes and tests.
Is there a MyStatLab answer key?
No answer key fits. MyStatLab gives each student different numbers, so a copied answer is usually wrong. The fast, honest way is to snap your own problem and follow the steps.
Does it work for ALEKS statistics?
Yes, for ALEKS learning topics, like probability and confidence intervals. Knowledge Checks are off limits. They tell ALEKS what you really know.
Can it show calculator steps?
It shows the formula and every number first, so you learn the method. Ask a follow-up and it explains how to do the same thing on a TI-84 or in Excel.
How accurate are the answers?
Like any stats solver, it can slip, so it shows every step for you to check. Make sure probabilities are between 0 and 1 and the conclusion matches the decision.
Can it help with my statistics homework?
Yes. It's a statistics homework helper that shows how to solve each problem. Use the steps to learn the pattern, then try the next one yourself. That's what helps on the exam.
Can I use it on a statistics exam?
No. Keep QuizeGpt closed on exams, quizzes that count, and proctored tests. Use it for homework you're allowed help on, practice problems, and review after you submit.
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