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The range is easy to calculate—it's the difference between the largest and smallest data points in a set. Standard deviation is the square root of the variance. Standard deviation is a measure …

It's a way of quantifying how spread out the data is from its mean. A small standard deviation means that the data points are generally close to the mean, while a large standard deviation …

Standard deviation involves adding and subtracting values at various steps in the calculation process. For example, the differences between each data point and the mean are calculated, …

The formula we use for standard deviation depends on whether the data is being considered a population of its own, or the data is a sample representing a larger population.

In population standard deviation is calculated using every individual from that population while in sample standard deviation we take specific number of individuals from the population.

Sal explains a different variance formula and why it works! For a population, the variance is calculated as σ² = ( Σ (x-μ)² ) / N. Another equivalent formula is σ² = ( (Σ x²) / N ) - μ². If we …

Practice calculating the mean and standard deviation for the sampling distribution of a sample proportion.

While meeting the independence condition is necessary for using the standard deviation formula for the sample proportion, the other conditions (random and normal) are also important for the …

What is the average age of the bears at your zoo? What is the standard deviation? Round your answers to the nearest tenth.