What is the sample size needed to create a 95% confidence interval with 2% margin of error?

Flashcards for review

Here is a set of online flashcards I found.

http://quizlet.com/267049/ap-statistics-flash-cards/

Ch 27 Finding the C.I. for a predicted value

This should be helpful with question 8 on math xl.

Sorry the program I used did not allow for embedding this video.

Calculating S.E.(b1)

I hope this helps

Chi-Squared

You may have seen this before when studying genetics.

Here is a site that shows how the chi-squared test is used in science.

There are Three different Chi-squared tests that you need to know.

• Goodness of fit
• Test for homogeneity
• Test for independence

Missing Table from problem 1 on Ch 25 Packet.

Ch 24 Guiding Questions - Comparing Means

1. What graphical display should you start with when comparing means?

2. How do you find the standard error of the difference of two means?

3. How is finding a confidence interval for the difference of means similar to finding any confidence interval we have already studied?

4. What assumptions and conditions must we check?

5. How should you determine degrees of freedom?

6. It is never wrong not to pool, what does this statement mean in regards to comparing means?

the INVT Function on your calculator

Here is a YouTube video on how to create a program for InvT on a TI-83 or TI-83 Plus Calculator