Statistics questions

Statistics
Tutor: None Selected Time limit: 1 Day

The population proportion was estimated to be 0.22. How large a sample would be required in order to estimate readers at or below eighth grade reading levels at 80% confidence level with an error of at most 0.03 round answer to next integer

Mar 3rd, 2015

I hope this page helps...the formula I would use would be the one in the box where we're solving for n, the sample size.

p is the pop proportion = 0.22

E is the error = 0.03

Za/2 is the critical value associated for 80% confidence and was calculated to be z = 1.282

Essentially, we want the z-score that leaves an area of (1 - 0.8) / 2 = 0.1 to the right--equivalent to a z-score of 0.900.


Calculated, the sample size comes out to be 313.20 rounded up to 314

Mar 3rd, 2015

Did you know? You can earn $20 for every friend you invite to Studypool!
Click here to
Refer a Friend
...
Mar 3rd, 2015
...
Mar 3rd, 2015
Dec 7th, 2016
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer