Math Padlet by Daniel Sansano https://padlet.com/zirconiumsansanoprincedaniel/h7t0drt6mwmcmxpa Me and Carlos project en-us 2020-10-25 07:43:26 UTC 2020-10-27 07:24:44 UTC hello@padlet.com What is Slovin's Formula zirconiumsansanoprincedaniel https://padlet.com/zirconiumsansanoprincedaniel/h7t0drt6mwmcmxpa/wish/861064371  - is used to calculate the sample size (n) given the population size (N) and a margin of error (e). 

- it's a random sampling technique formula to estimate sampling size 

-It is computed as n = N / (1+Ne2).
whereas: 
n = no. of samples
N = total population
e = error margin / margin of error

]]> 2020-10-26 09:51:05 UTC https://padlet.com/zirconiumsansanoprincedaniel/h7t0drt6mwmcmxpa/wish/861064371 When to use Slovin's Formula zirconiumsansanoprincedaniel https://padlet.com/zirconiumsansanoprincedaniel/h7t0drt6mwmcmxpa/wish/861066041 If a sample is taken from a population, a formula must be used to take into account confidence levels and margins of error. When taking statistical samples, sometimes a lot is known about a population, sometimes a little and sometimes nothing at all. For example, we may know that a population is normally distributed (e.g., for heights, weights or IQs), we may know that there is a bimodal distribution (as often happens with class grades in mathematics classes) or we may have no idea about how a population is going to behave (such as polling college students to get their opinions about quality of student life). Slovin's formula is used when nothing about the behavior of a population is known at at all.]]> 2020-10-26 09:51:55 UTC https://padlet.com/zirconiumsansanoprincedaniel/h7t0drt6mwmcmxpa/wish/861066041 Slovin formula Problem #1 zirconiumsansanoprincedaniel https://padlet.com/zirconiumsansanoprincedaniel/h7t0drt6mwmcmxpa/wish/861086656 suppose that a group of 1,000 city government employees needs to be surveyed to find out which tools are best suited to their jobs. For this survey a margin of error of 0.05 is considered sufficiently accurate. Using Slovin’s formula, the required sample survey size equals
 
size equals n=N÷(1+Ne2) people:

n=1,000÷(1+1,000x0.05x0.05)=286

The survey therefore needs to include 286 employees.

]]> 2020-10-26 10:02:46 UTC https://padlet.com/zirconiumsansanoprincedaniel/h7t0drt6mwmcmxpa/wish/861086656 Slovin formula Problem #2 zirconiumtagoddaniel https://padlet.com/zirconiumsansanoprincedaniel/h7t0drt6mwmcmxpa/wish/861090039 Use Slovin’s formula to find out what sample of a population of 1,000 people you need to take for a survey on their soda preferences.
Figure out what you want your confidence level to be. For example, you might want a confidence level of 95 percent (giving you an alpha level of 0.05), or you might need better accuracy at the 98 percent confidence level (alpha level of 0.02).
In this example, we’ll use a 95 percent confidence level with a population size of 1,000.
n = N / (1 + N e2) =
1,000 / (1 + 1000 * 0.05 2) = 285.714286
Round your answer to a Whole number (because you can’t sample a fraction of a person or thing!)
285.714286 = 286]]> 2020-10-26 10:04:25 UTC https://padlet.com/zirconiumsansanoprincedaniel/h7t0drt6mwmcmxpa/wish/861090039