Question

In: Statistics and Probability

Table 2: Number of items Suspended Rocks Kittens Daggers Wookies Luke 25 15 30 3 Rey...

Table 2: Number of items Suspended
Rocks Kittens Daggers Wookies
Luke 25 15 30 3
Rey 30 5 45 2
Anikin 25 25 40 5
Examine the data in Table 2.  It shows the number of different types of objects that each
Jedi trainee can suspend in the air after 12 weeks of training.  
Do an ANOVA analysis - Randomized Block Design at alpha = 0.05.
Put the output in the indicated area.
Is there a difference in the 3 kids overall ability to suspend objects in the air (rows)?
Is there a difference in the type of object that is suspend objects in the air (columns)?
Put the p-factor and coclusion in the indicated space.
Based upon the data in Table 2, perform a Chi-square Test Of Independence to determine
if the type of suspended objects is dependent upon the  Jedi trainee doing the suspending.

Solutions

Expert Solution

Anova: Two-Factor Without Replication
SUMMARY Count Sum Average Variance
Luke 4 73 18.25 142.25
Rey 4 82 20.5 424.3333
Anikin 4 95 23.75 206.25
Rocks 3 80 26.66667 8.333333
Kittens 3 45 15 100
Daggers 3 115 38.33333 58.33333
Wookies 3 10 3.333333 2.333333
ANOVA
Source of Variation SS df MS F P-value F crit
Rows 61.16667 2 30.58333 0.662854 0.549421 5.143253
Columns 2041.667 3 680.5556 14.75015 0.003553 4.757063
Error 276.8333 6 46.13889
Total 2379.667 11

p value for rows : 0.5494

p value > 0.05, do not reject Ho

so,  there is not a difference in the 3 kids overall ability to suspend objects in the air (rows)

.................

p value for column: 0.0035

p value<0.05, reject Ho

so, there is a difference in the type of object that is suspend objects in the air (columns)

..........................

Chi-Square Test of independence
Observed Frequencies
0
0 Rocks Kittens Daggers Wookies Total
Luke 25 15 30 3 73
Rey 30 5 45 2 82
Anikin 25 25 40 5 95
Total 80 45 115 10 250
Expected frequency of a cell = sum of row*sum of column / total sum
Expected Frequencies
Rocks Kittens Daggers Wookies Total
Luke 80*73/250=23.36 45*73/250=13.14 115*73/250=33.58 10*73/250=2.92 73
Rey 80*82/250=26.24 45*82/250=14.76 115*82/250=37.72 10*82/250=3.28 82
Anikin 80*95/250=30.4 45*95/250=17.1 115*95/250=43.7 10*95/250=3.8 95
Total 80 45 115 10 250
(fo-fe)^2/fe
Luke 0.115 0.263 0.382 0.002
Rey 0.539 6.454 1.405 0.500
Anikin 0.9592 3.6497 0.3133 0.3789

Chi-Square Test Statistic,χ² = Σ(fo-fe)^2/fe =   14.961  
      
Level of Significance =   0.05  
Number of Rows =   3  
Number of Columns =   4  
Degrees of Freedom=(#row - 1)(#column -1) = (3- 1 ) * ( 4- 1 ) =   6  
      
p-Value =   0.0206   [Excel function: =CHISQ.DIST.RT(χ²,df) ]
Decision:    p-value < α , Reject Ho  


type of suspended objects is dependent upon the  Jedi trainee doing the suspending.

.........................

Please revert back in case of any doubt.

Please upvote. Thanks in advance.


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