Question

In: Statistics and Probability

3. Suppose that a toy manufacturer developed 2 toys for the new season. Four different brands  ...

3. Suppose that a toy manufacturer developed 2 toys for the new season. Four different brands  

    of batteries are uses in each of the 2 toys. The life of the toys with different batteries was analyzed.  

MINITAB results are presented.  Two measurements were taken for each brand of batteries used on the 2 toys.  Please: USE the P-Values, NOT F Tables.

Each toy will be sold equipped with the specific battery which lasted the longest.

What design should be used?  Circle the one you would use:

ONE WAY                      TWO WAYS Block               TWO WAYS with Interaction, (Factorial)

        ………………………………………………………………………………………………

Complete the table ONLY for the design you have selected above

(ONEWAY) :  Source  Brands

Source    DF     Adj SS     Adj MS     F-Value     P-Value

Brands            104.0                             0.079

Error                        12.00

Total     15      248.0

(TWO WAY Non Interaction) : Sources    Brands and Toys

Source    DF      Adj SS     Adj MS     F-Value    P-Value

Brands            104.00                            0.023

Toys                          64.00                 0.013

Error                         7.273

Total     15      248.00

(TWO WAY With  Interaction) : Res versus A  and  B + Interaction

Source  DF        Adj SS     Adj MS      F-Value    P-Value

  A               104.00                             0.013

  B                           64.00                  0.007

  A*B              40.00                             0.119

Error                         5.000

Total   15        248.00

USE ANOVA TO ANSWER THESE QUESTIONS, (Use α = 0.05).  

Are the Batteries performing equally or do they show differences?………………..

State the Alternate Hypothesis for Batteries:  Ha : …………………………………….

How many degrees of freedom for Batteries?…….

What is the value for  MS  for Batteries?………                  And  the  F statistic?……

If you selected BLOCK or FACTORIAL designs, answer the following questions:

Are the Toys performing equally or do they show differences?………………..

State the Alternate Hypothesis for Toys:  Ha : …………………………………….

How many degrees of freedom for Toys?…….

What is the value for  SS  for Toys?………                  And  the  F statistic?……

If you selected Factorial design, is the INTERACTION  statistically significant?……………….

How many degrees of freedom for the INTERACTION?……...

Solutions

Expert Solution

What design should be used? TWO WAYS with Interaction, (Factorial)



Are the Batteries performing equally or are they showing differences? They are showing differences.
: the measurement of at least one of the 4 brands of batteries is different.
Degrees of freedom = 3.
MS = 34.67, F statistic = 6.93.

Are the Toys performing equally or are they showing differences? They are showing differences.
: the measurement of at least one of the 2 brands of toys is different.
Degrees of freedom = 1.
SS = 64.00, F statistic = 12.8.

Is the Interaction statistically significant? No, it is not statistically significant.
Degrees of freedom for Interaction = 3.


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