Saturday

November 22, 2014

November 22, 2014

Posted by **Jaz** on Tuesday, March 17, 2009 at 9:59am.

a.At least 45% of the sample believes that violence is the school’s most serious problem.

b.Less than 35% of the sample believes that violence is the most serious problem.

c.The sample proportion is between 0.35 and 0.45.

- stats need help -
**economyst**, Tuesday, March 17, 2009 at 4:12pm.45 is .05 away from the mean or .05/.023 = 2.17 standard deviations away from the mean. Your stats book should have a cumulative normal distribution table. Look up 2.17. I get .9850, meaning that the probability of observing a sample where more than 45% is 1-.985 = .015=1.5%

.35 is also 2.17 standard deviations from the mean. Take it from here.

- stats need help -
**jaz**, Tuesday, March 17, 2009 at 6:55pmso for c. do i subtract the amounts of the two

**Answer this Question**

**Related Questions**

stats need help - Violence in School, I An SRS of 400 American adults is asked “...

ap stats - Violence in School, I An SRS of 400 American adults is asked “What do...

stats - Violence in School, I An SRS of 400 American adults is asked “What do ...

statistics - 2. The National polling organization conducted a phone survey of ...

writing - Have you ever wondered what the world would be like in the future? ...

English - Writeacher, I need your help to write the English translation of the ...

Social plz......help - 1 what is the most important issue or problem facing our ...

Literature - I have to write a persuasive essay on the topic of school uniforms...

ap statistics - an opinion poll asks a sample of 500 adults (an SRS) whether ...

English - You are perfectly right. I wanted to add these sentences, too. I ...