Thursday

August 28, 2014

August 28, 2014

Posted by **Blerp** on Friday, November 16, 2012 at 11:35am.

7

44

8

62

87

- Statistics -
**MathGuru**, Friday, November 16, 2012 at 7:15pmFormula:

n = [(z-value * sd)/E]^2

...where n = sample size, z-value will be found using a z-table to represent the 90% confidence interval, sd = 40, E = 10, ^2 means squared, and * means to multiply.

Plug the values into the formula and finish the calculation. Round your answer to the next highest whole number.

- Statistics -
**Anonymous**, Sunday, March 30, 2014 at 3:09pm44

**Related Questions**

statistics - the life of light bulbs is distributed normally. The variance of ...

statistics - Write the null and alternative hypotheses. Justify which is the ...

statitics - a light bulb manufacture gaurentees that the mean life of a certain ...

college - a light bulb manufacture claims that the mean life of a certain type ...

statistics - Suppose that the certain lifetimes of a certain light bulb are ...

Physics - A special kind of light bulb emits monochromatic light of wavelength ...

probability and statistics - An electrical firm manufactures light bulbs that ...

Statistics - An industrial engineer has found that the standard household light ...

physics - You are in the lab with a 10 V battery. You have a 10 W light bulb and...

college physics - You are in the lab with a 10 V battery. You have a 10 W light ...