Question

In an effort to promote a new product, a marketing firm asks participants to rate the effectiveness of ads that varied by length (short, long) and by type of technology (static, dynamic, interactive). Higher ratings indicated greater effectiveness. Source of Variation SS df MS F Length 15 Technology Length × Technology 154 Error 570 114 Total 869 (a) Complete the F-table and make a decision to retain or reject the null hypothesis for each hypothesis test. (Assume experimentwise alpha equal to 0.05.) Source of Variation SS df MS F Length 15 Technology 130 Correct: Your answer is correct. Length × Technology 154 Error 570 114 356 Total 869

Answer #1

Lenght has two levels i.e. r = 2 and Technology has 3 levels i.e c = 3.

**Data Table:**

Source of Variation | SS | DF | MS | F | p-value |

Length | 15 | 1 | 15 | 3 | 0.0859 |

Technology | 130 | 2 | 65 | 13 | 0 |

Length × Technology | 154 | 2 | 77 | 15.4 | 0 |

Error | 570 | 114 | 5 | ||

Total | 869 | 119 |

**Conclusion:**

Fail to reject the null hypothesis when it comes to Length.

Reject the null hypothesis when it comes to Technology.

Reject the null hypothesis when it comes to interaction between Lenght and Technology.

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In an effort to promote a new product, a marketing firm asks
participants to rate the effectiveness of ads that varied by length
(short, long) and by type of technology (static, dynamic,
interactive). Higher ratings indicated greater effectiveness.
Source of Variation
SS
df
MS
F
Length
10
Technology
Length ×
Technology
142
Error
570
114
Total
802
(a) Complete the F-table and make a decision to retain
or reject the null hypothesis for each hypothesis test. (Assume
experimentwise alpha equal...

In an effort to promote a new product, a marketing firm asks
participants to rate the effectiveness of ads that varied by length
(short, long) and by type of technology (static, dynamic,
interactive). Higher ratings indicated greater effectiveness.
Source of Variation
SS
df
MS
F
Length
5
Technology
Length ×
Technology
150
Error
570
114
Total
855
(a) Complete the F-table and make a decision to retain
or reject the null hypothesis for each hypothesis test. (Assume
experimentwise alpha equal...

In an effort to promote a new product, a marketing firm asks
participants to rate the effectiveness of ads that varied by length
(short, long) and by type of technology (static, dynamic,
interactive). Higher ratings indicated greater effectiveness.
Source of Variation
SS
df
MS
F
Length
15
Technology
Length ×
Technology
152
Error
570
114
Total
827
(a) Complete the F-table and make a decision...

In an effort to promote a new product, a marketing firm asks
participants to rate the effectiveness of ads that varied by length
(short, long) and by type of technology (static, dynamic,
interactive). Higher ratings indicated greater effectiveness.
Source of Variation
SS
df
MS
F
Length
10
Technology
Length ×
Technology
156
Error
570
114
Total
826
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