# Statistic

**1.** What does Anova Stand for and what is it used for?

**2**. In a one way Anova, what is the difference between the among group variation and the within-group variances?

**3**. What are the 3 assumptions needed to complete the ANOVA analysis and explain

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Order Paper Now**4.** Use the Classwork week 6 excel spreadsheet below and solve the problem provided. You will need the following table to find the Qcritical value.

**http://davidmlane.com/hyperstat/sr_table.html**

Watch the following video on how to find the tukey-kramer comparison for part b of the problem

VIDEO https://www.youtube.com/watch?v=z3dnGuAry2w&feature=emb_title

the excel file “one-way ANOVA” workbook provides examples and formulas. Worksheet TK and TK_Formulas provides formulas for the Tukey Kramer part of the problem

**5.** Go over the **Ch. 12 lecture slides** and answer the following questions:

a. what are contingency tables used for? Provide 3 reasons

b. Draw a sample Contingency table and put the appropriate labels

c. What is the Chi-Squared Test Statistic? Write out the formula ( do it by hand if you can’t use a math editor program)

d. what is fo ?

e. What is fe ?

f. Is there a Chi critical value and if so, how do you find it?