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A/B Testing Calculator For Statistical Significant

Are you wondering if a design or copy change impacted your sales? Enter your visitor and conversion numbers below to find out. The significance calculator willtell you if a variation increased your sales, and by how much.

How many visitors
How many sales or leads
Conversion rate
The number of visitors on this page was:
The number of overall conversions was:
Conversion rate
A
>
12%
B
>
12%

You can do more than A or B

Add Another Variation

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Unfortunately, your results are not statistically significant.

A Refresher on Statistical Significance

Statistical significance helps quantify whether a result is likely due to chance or to some factor of interest. When a finding is significant, it simply means you can feel confident that’s it real, not that you just got lucky (or unlucky) in choosing the sample.

When you run an experiment, conduct a survey, take a poll, or analyze a set of data, you’re taking a sample of some population of interest, not looking at every single data point that you possibly can. Consider the example of a marketing campaign. You’ve come up with a new concept and you want to see if it works better than your current one. You can’t show it to every single target customer, of course, so you choose a sample group.

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A Refresher On Statistical Significance

Statistical significance helps quantify whether a result is likely due to chance or to some factor of interest. When a finding is significant, it simply means you can feel confident that’s it real, not that you just got lucky (or unlucky) in choosing the sample.

When you run an experiment, conduct a survey, take a poll, or analyze a set of data, you’re taking a sample of some population of interest, not looking at every single data point that you possibly can. Consider the example of a marketing campaign. You’ve come up with a new concept and you want to see if it works better than your current one. You can’t show it to every single target customer, of course, so you choose a sample group.

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How Big Should My Sample Size Be

2 main contributors to sampling error: the size of the sample and the variation in the underlying population. Sample size may be intuitive enough. Think about flipping a coin five times versus flipping it 500 times. The more times you flip, the less likely you’ll end up with a great majority of heads. The same is true of statistical significance: with bigger sample sizes, you’re less likely to get results that reflect randomness. All else being equal, you’ll feel more comfortable in the accuracy of the campaigns’ $1.76 difference if you showed the new one to 1,000 people rather than just 25. Of course, showing the campaign to more people costs more, so you have to balance the need for a larger sample size with your budget.

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Filipino Traits & Culture

How Big Should My Sample Size Be?

2 main contributors to sampling error: the size of the sample and the variation in the underlying population. Sample size may be intuitive enough. Think about flipping a coin five times versus flipping it 500 times. The more times you flip, the less likely you’ll end up with a great majority of heads. The same is true of statistical significance: with bigger sample sizes, you’re less likely to get results that reflect randomness. All else being equal, you’ll feel more comfortable in the accuracy of the campaigns’ $1.76 difference if you showed the new one to 1,000 people rather than just 25. Of course, showing the campaign to more people costs more, so you have to balance the need for a larger sample size with your budget.

Filipino Traits & Culture
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BruntWork Is The World's Leading Outsourcing Company

BruntWork is often featured in the news as it continues its quest to become the largest outsourcing company in the world. Read about us below. 

BruntWork in Forbes
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What Do Agents Think About Working for BruntWork's Clients?

Caren Mangaran shares her experience, firsthand.

The BruntWork A/B Testing Calculator

If you’re wondering the best way to determine whether a change to a homepage or landing page is better or worse, start with our A/B Statistical Significance Calculator. 

What is statistical significance?
Statistical significance is a term used in statistics to refer to the likelihood that a result or finding is caused by something other than chance. In order to be considered statistically significant, a result must be unlikely to have occurred by chance alone.
 
Statistical significance is usually determined by calculating a p-value. The p-value is the probability of obtaining a result at least as extreme as the observed result, given that the null hypothesis is true. The null hypothesis is the hypothesis that there is no difference between the two groups being compared. A p-value of less than 0.05 (5%) is generally considered to be statistically significant.
 
It is important to note that statistical significance does not necessarily mean that a result is clinically or practically significant. For example, a difference between two groups may be statistically significant, but the difference may not be large enough to be clinically meaningful.
How do you calculate statistical significance?
In order to calculate statistical significance, you will need to use a statistical test. This test will allow you to determine whether or not your results are due to chance.
The first step is to form a hypothesis. For any experiment, there is a null hypothesis, which states there’s no relationship between the two things you’re comparing, and an alternative hypothesis. An alternative hypothesis typically tries to prove that a relationship exists and is the statement you’re trying to back up. If you’re talking about conversion-rate AB testing, your hypothesis may involve adding a button, image, or some copy to a page to see if it affects conversion rates. When you’re using surveys for concept testing, like in the example above, your hypothesis might involve testing different ad variants to see which people find most appealing.
 
There are many different statistical tests that you can use, but the most common is the Student’s t-test. This test is used to compare two means.
 
To use the Student’s t-test, you will need to calculate the mean, standard deviation, and number of samples for both groups that you are comparing. You will then use the following formula:
 
t = (x1-x2)/sqrt((s1^2/n1)+(s2^2/n2))
 
x1 and x2 are the means of the two groups, s1 and s2 are the standard deviations of the two groups, and n1 and n2 are the number of samples in the two groups.
 
The resulting t-value will tell you whether or not your results are statistically significant. If the t-value is greater than 2.58, then your results are statistically significant.
What does statistical significance depend on?
Statistical significance is a term used in statistics to describe how likely it is that a results occurred by chance. The level of significance is usually set at 0.05, which means that there is a 5% chance that the results could have occurred by chance.
 
There are three main factors that affect statistical significance: sample size, variability, and the difference between the groups being compared.
 
Sample size is the number of people or things in a group being studied. The larger the sample size, the more reliable the results.
 
Variability is the amount of difference between the results of different people or things in a group. The less variability, the more reliable the results.
 
The difference between the groups being compared is the amount of difference between the groups on the measure being studied. The larger the difference, the more likely it is that the results are not due to chance.
 
When all three of these factors are taken into account, it is easier to determine whether the results of a study are statistically significant.
What happens if your data is not statistically significant?
The minimum sample size for statistical significance is the number of observations in a sample that are required in order to obtain a desired level of significance. The desired level of significance is usually set at 0.05, which means that there is a 5% chance that the results are due to chance. In order to obtain a minimum sample size for statistical significance, one must first determine the desired level of confidence and then use a statistical formula to calculate the minimum sample size.
 
The level of confidence is the probability that the results of a study are true. For example, if the level of confidence is set at 0.95, this means that there is a 95% chance that the results are true. The level of confidence is usually set at 0.95 or 0.99. The higher the level of confidence, the more sure one can be that the results are true.
 
The minimum sample size can be calculated using a statistical formula. The formula is:
 
n = (Z(α/2))2 * P * (1-P) / (d^2)
 
where:
 
n is the minimum sample size
 
Z(α/2) is the z-score for the desired level of confidence
 
P is the population proportion
 
d is the desired level of precision
 
For example, if the desired level of confidence is 0.95 and the population proportion is 0.5, the minimum sample size would be:
 
n = (Z(0.95/2))2 * 0.5 * (1-0.5) / (0.05)2
 
n = (1.96)2 * 0.5 * 0.5 / (0.05)2
 
n = 384.16 / 0.0025
 
n = 153,266
 
This means that the minimum sample size for statistical significance is 153,266.

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