Question: A tech company is developing two different versions of a mobile app interface ( SimpleDesign and AdvancedDesign ) and wants to assess user satisfaction. In

A tech company is developing two different versions of a mobile app interface

(

SimpleDesign and AdvancedDesign

)

and wants to assess user satisfaction. In a usability test,

50

participants were randomly assigned to interact with either SimpleDesign or AdvancedDesign. User satisfaction scores were collected, showing that participants using SimpleDesign had a mean satisfaction score of M

= 8 (

= 1.5),

while those using AdvancedDesign had a mean score of M

= 9 (

= 1) .

Calculate the pooled variance.

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