Comp. Statistics Quiz 1

How is significance of An Anova test determined?

• By Calculating Chi Squared Statistics
• By Calculating F Statistics
• By Calculating t Statistics
• All of these

• 3.40
• 3.52
• 3.88
• 3.97

• 
• Alternative Hypothesis: At least one population mean is different from other
• 
• Variance are compared in F ratio to determine mean difference are significantly bigger than chance

• (6,24,29)
• (6,30,30)
• (2,24,29)
• None of these

For Anova which option is wrong

• Total Sum of Squares= Total Variation in data
• 
• 
• Total Degree of freedom=between degree of freedom + within the degree of freedom

If E(x) = 2 and E(z) = 4, then E(z – x) =?

• 2
• 6
• 0
• Insufficient data

Two random Variables are uncorrelated then

• The correlation is always greater than 0
• The correlation is always less than 0
• The correlation is always equal to 0.
• The correlation is always not equal to 0.

• 1
• 1/4
• -2/3
• None of the above

Find Marginal PDF of Y

• 2-y
• 2-x
• 3/2
• None of the above

• 0
• -2/8
• 2/8
• None of these