Sunday

March 29, 2015

March 29, 2015

Posted by **Anonymous** on Monday, October 13, 2008 at 10:20pm.

be large enough that your 95% confidence interval will extend about 0.03 above your

estimate (whatever it turns out to be) and about 0.03 below your estimate (if you read the newspaper, political polls are always reported with “a 3% margin of error”, and that is what I am defining). By definition, a 95% confidence interval roughly needs to extend 2 times the standard deviation from the estimated mean (in this case, the mean is the fraction that prefer apples; it turns out this will be very close to normally distributed even though the numbers are fractions and can have only discrete values). Using that rule, how many samples do you need for your 95% confidence interval to extend 0.03 above and 0.03 below the mean?

**Answer this Question**

**Related Questions**

Civics - The most important effect of the amendments that have been added to the...

StatIstics - "Household size" is defined as the number of people living in a ...

math - you plan to survey people to see what percent own their home and what ...

statistics - in 1995,the gallup poll asked a sample of 620 adults whether their ...

Math - If there are 16 people at a party and one of the group decided to conduct...

statistics - A political candidate has asked you to conduct a poll to determine ...

marketing - Binomial probability distributions are used in business, science, ...

statistics - A poll asked 500 adults if they thought Ontario should produce more...

Math - A phone tree is used to let committee members know that a meeting is ...

math - A vampire could have the ability to infect an entire planet if he bit 2 ...