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BurningAshe BurningAshe
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7 years ago
For the independent t test, the null hypothesis is always stated in terms
   of
 
  a. the sample means
  b. the population means
  c. both of these
  d. neither of these

Question 2

In an analysis of variance with a between-groups population variance estimate of 30 and a within-groups estimate of 25, the F ratio is
 
  A) 25 / (3025) = 5.00
  B) (3025) /30 = 0.17
  C) 25/30 = 0.83
  D) 30/25 = 1.20

Question 3

Ann conducts a study, and finds that the estimated population variances for the groups are 12.8, 16.3, 15.1, and 19.9. What is the within-groups estimate of the population variance?
 
  A) (12.82 + 16.32 + 15.12 + 19.92) / (4  1) = 351.18.
  B) (12.82 + 16.32 + 15.12 + 19.92) / 4 = 263.39.
  C) (12.8 + 16.3 + 15.1 + 19.9) / (4  1) = 21.37.
  D) (12.8 + 16.3 + 15.1 + 19.9) / 4 = 16.03.

Question 4

Assuming that the difference between two independent sample means is 6.24, and S2difference = 27, what is the calculated t score?
 
  A) (6.24 + 2) / 27 = 0.31
  B) (6.24 + 2) / 27 = 8.24 / 5.20 = 1.58
  C) 6.24 / 27 = 0.23
  D) 6.24 / 27 = 6.24 / 5.20 = 1.20

Question 5

ased on the following results, which would be the correct use of the formula, t = (M1  M2) / Sdifference? Sample 1: Mean = 60; Variance of the distribution of means = 2 Sample 2: Mean = 50; Variance of the distribution of means = 7
 
  A) t = (7  2) / (50+60)
  B) t = (60  50) / (22+72)/2
  C) t = (60  50) / (2+7)
  D) t = (60  50) / (2+7)
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kzabeckzabec
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Thank you, thank you, thank you!
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