Find the minimum sample size n needed to estimate u for the given values of c, o, and E. c=0.98, o=7.4, and E=1 assume the preliminary sample has at least 30 members. N= Round to the nearest whole number @irishboy123

Question

Find the minimum sample size n needed to estimate u for the given values of c, o, and E. c=0.98, o=7.4, and E=1 assume the preliminary sample has at least 30 members. N=         Round to the nearest whole number @irishboy123

irishboy123 · Answer

what's E?!

loviy · Answer

Take note of the formula: $$\displaystyle \text{n} = (\frac{\displaystyle \text{z}_{\alpha/2} * \sigma }{ \text{E}} )^2$$

loviy · Answer

The $$z_{a/2}$$ can be found using a z-table.