# Point Estimate Calculator

Enter the number of successes, the number of trials, and confidence interval of the data set into this point estimate calculator to calculate the best point estimate.

## Point Estimate Formula

The following formula can be used to estimate the best point. This is considered the Wilson Estimation.

X = (S + z²/2) / (T + z²)

• Where S is the number of successes
• T is the number of trials
• z is the confidence interval

## What is a point estimate?

A point estimate is a term used to understand probability when a bias may be involved. For example, if there’s an event, say flipping a coin, the result over an infinite sample size should be even at 50/50. But what is that coin is weight to one side slightly. The result may turn to 40/60. A point estimate takes into account that bias in the form of a confidence interval and calculates the probability of getting one outcome.

## How to calculate a point estimate

The following example is a step by step process of calculating a point estimate.

1. First, we must determine which missing variables we need to calculate the point estimate. In this case, the variable would be S, the number of successes, T is the number of trials, z is the confidence interval.
2. The next step is to find the values for all of those variables.
3. Finally, enter all of the information into the formula or calculator above.