Ap Stats Calculator

How to Use the AP Stats Calculator

This calculator provides four essential statistical tools. Enter your data or parameters, then click the corresponding button to compute results.

1. Descriptive Statistics

• Input: Enter numbers separated by commas (e.g., 5, 7, 9, 11, 13).
• Output: Mean, median, mode, range, variance, standard deviation, Q1, Q3, and IQR.
• Tip: Ensure all entries are numeric; non-numeric values are ignored.

2. Binomial Probability

• Inputs: Sample size (n), probability of success (p), and number of successes (x).
• Output: P(X = x) using the formula C(n,x) × p^x × (1-p)^(n-x).
• Constraints: n ≥ 0, 0 ≤ p ≤ 1, 0 ≤ x ≤ n.

3. Confidence Interval for Mean

• Inputs: Sample mean, sample standard deviation, sample size (n), and confidence level (90%, 95%, or 99%).
• Output: Confidence interval using z-scores (1.645, 1.96, or 2.576).
• Tip: Standard deviation must be ≥ 0 and n ≥ 1.

4. Hypothesis Test for Proportion

• Inputs: Null hypothesis proportion (p₀), sample proportion (p̂), and sample size (n).
• Output: z-test statistic: (p̂ - p₀) / √(p₀(1-p₀)/n).
• Constraints: 0 ≤ p₀, p̂ ≤ 1, n ≥ 1.

Note: All results are rounded to 4 decimal places (6 for binomial probability). Invalid inputs will show an error message.