Question

In: Statistics and Probability

A factorial experiment was designed to test for any significant differences in the time needed to...

A factorial experiment was designed to test for any significant differences in the time needed to perform English to foreign language translations with two computerized language translators. Because the type of language translated was also considered a significant factor, translations were made with both systems for three different languages: Spanish, French, and German. Use the following data for translation time in hours.

Language
Spanish French German
System 1 7 8 14
11 12 18
System 2 5 16 19
9 18 25

Test for any significant differences due to language translator system (Factor A), type of language (Factor B), and interaction. Use  = .05.

  1. Complete the following ANOVA table (to 2 decimals, if necessary). Round p-value to four decimal places.
    Source of Variation Sum of Squares Degrees of Freedom Mean Square F p-value
    Factor A
    Factor B
    Interaction
    Error
    Total

  2. The p-value for Factor A is Selectless than .005between .005 and .0125between .0125 and .025between .025 and .05greater than .05Item 21

    What is your conclusion with respect to Factor A?
    SelectFactor A is significantFactor A is not significantItem 22
  3. The p-value for Factor B is Selectless than .005between .005 and .0125between .0125 and .025between .025 and .05greater than .05Item 23

    What is your conclusion with respect to Factor B?
    SelectFactor B is significantFactor B is not significantItem 24
  4. The p-value for the interaction of factors A and B is Selectless than .005between .005 and .0125between .0125 and .025between .025 and .05greater than .05Item 25

    What is your conclusion with respect to the interaction of Factors A and B?
    SelectThe interaction of factors A and B is significantThe interaction of factors A and B is not significantItem 26

Solutions

Expert Solution

Excel > Data > Data Analysis > Anova: Two-Factor With Replication

Anova: Two-Factor With Replication
SUMMARY Spanish French German Total
System 1
Count 2 2 2 6
Sum 18 20 32 70
Average 9 10 16 11.66666667
Variance 8 8 8 16.26666667
System 2
Count 2 2 2 6
Sum 14 34 44 92
Average 7 17 22 15.33333333
Variance 8 2 18 52.26666667
Total
Count 4 4 4
Sum 32 54 76
Average 8 13.5 19
Variance 6.666666667 19.66666667 20.66666667
ANOVA
Source of Variation SS df MS F P-value F crit
Factor A 40.33333333 1 40.33333333 4.653846154 0.074355681 5.987377607
Factor B 242 2 121 13.96153846 0.005533094 5.14325285
Interaction 48.66666667 2 24.33333333 2.807692308 0.137832923 5.14325285
Within 52 6 8.666666667
Total 383 11

b)

p value for Factor A = 0.0743

P value > 0.05, Do not reject H0

Factor A is not significant

c)

p-value for Factor B = 0.0055

P value between .005 and .0125

Factor B is significant because P value < 0.05

d)

The p-value for the interaction of factors A and B is 0.1378

P value > 0.05

The interaction of factors A and B is not significant


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