See what we can offer to your school
"SimpleStudy just makes sense...”
Get the best plan for your school
12 questions from this quiz
Average of entire population
μ\muμ
xˉ\bar{x}xˉ
μ=∑xN\mu = \frac{\sum x}{N}μ=N∑x
xˉ=∑xn\bar{x} = \frac{\sum x}{n}xˉ=n∑x
When measuring entire population is impractical
Range where population mean likely falls
xˉ±z×sn\bar{x} \pm z \times \frac{s}{\sqrt{n}}xˉ±z×ns
1.961.961.96
NNN is population size, nnn is sample size
808080
Sample standard deviation
Select your subjects, and get access to A+ resources today.