# What is the value of 2.2e 16?

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## What is the value of 2.2e 16?

2.2e-16 is the scientific notation of 0.00000000000000022, meaning it is very close to zero. Your statistical software probably uses this notation automatically for very small numbers.

## What is e in p-value?

The E-value corresponds to the expected number of times in multiple testing that one expects to obtain a test statistic at least as extreme as the one that was actually observed if one assumes that the null hypothesis is true. The E-value is the product of the number of tests and the p-value.

**What does p-value 2.2e 16 mean in R?**

When we perform a t test in R and the difference between two groups is very large then the p-value of the test is printed as 2.2e – 16 which is a printing behaviour of R for hypothesis testing procedures. The actual p-value can be extracted by using the t test function as t.

### What does t-test tell you?

A t-test is a statistical test that is used to compare the means of two groups. It is often used in hypothesis testing to determine whether a process or treatment actually has an effect on the population of interest, or whether two groups are different from one another.

### What does the e mean in R?

R uses scientific e notation where e tells you to multiple the base number by 10 raised to the power shown. Let’s start with the number 28. Scientific notation adds a decimal after the first number before applying the system. So 28 becomes 2.8 x 10^1 or 2.8e+01 in e notation.

**What does a low p-value mean?**

A low P value suggests that your sample provides enough evidence that you can reject the null hypothesis for the entire population.

## What does e stand for in math?

The number e, also known as Euler’s number, is a mathematical constant approximately equal to 2.71828 which can be characterized in many ways. It is the base of the natural logarithms. It is the limit of (1 + 1/n)n as n approaches infinity, an expression that arises in the study of compound interest.

## How do you read an e+ number?

On a calculator display, E (or e) stands for exponent of 10, and it’s always followed by another number, which is the value of the exponent. For example, a calculator would show the number 25 trillion as either 2.5E13 or 2.5e13.