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Exhibit 15-3 Pertain to the following data.
group 1 group2 group3
4 11 1
9 11 6
10 10 4
Refer to Exhibit 15-3. What is the value of Fobt?
1. 3.26
2. 1.95
3. 6.53
4. 5.67
Refer to Exhibit 15-3. What is the value of Fcrit ? Use a = 0.05.
1. 5.14
2. 4.07
3. 4.76
4. 4.46
Refer to Exhibit 15-3. What is your conclusion? Again use a = 0.05
1. reject H0
2. retain H0
3. accept H0
4. reject H1
Refer to Exhibit 15-3. Using w^2, the estimated size of effect is ____.
1. 52.8% of the variability
2. 43.6% of the variability
3. 22.6% of the variability
4. 55.1% of the variability (Effect Size = (SSR - DfR * MSE)/(SST + MSE)
Refer to Exhibit 15-3. what is the estimated size of effect?
1. 0.7232
2. 0.6852 (Effect Size = SSR/SST)
3. 0.6312
4. 0.6582
Having just made what you feel is to be a Type II error, using an independent groups design and a t test analysis, which of the following might you do in the next experiment to reduce the probability of a Type II error?
1. increase N
2. change to a correlated groups design
3. try to reduce the variance by better experimental control
4. all of the other three options
The t test for correlated groups requires that ____.
1. the population raw scores are normally distributed
2. the sampling distribution of is normally is normally distributed
3. N ³ 30
4. the sampling distribution of is normally distributed
sB2 is a measure of ____.
1. o2 alone
2. the variability between the means
3. o2 + the effects of the independent variable and the variability between the means
4. o2 + the effects of the independent variable
What is the value of SST if SSB = 236 and SSW = 54?
1. 4.37
2. 290
3. 100
4. 182
If x1= 46, x2 = 50, x3= 92 and n1 = n2 = n3, what is the value of Xg?
1. 50.0
2. 188.0
3. 62.67
4. cannot be determined from information given
If SSW = 126, N = 28, k = 4, then what is the value of sW2
1. 42.0
2. 4.667
3. cannot be determined from information given
4. 5.25
If dfB = 3 and dfT = 29 and Fobt = 3.15, what would you conclude using a = 0.05?
1. retain H1
2. reject H1
3. reject H0
4. retain H0
The sampling distribution of chi-square is ____.
1. all of the other three options
2. varies with df
3. is a theoretical distribution
4. skewed
The computation of fe ____.
1. none of the other three options
2. is based on known population proportions
3. is based on population means
4. is based on population proportion estimates
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