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March 1, 2015

March 1, 2015

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

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