A researcher tests how room lighting (bright vs. dim) and ba…
A researcher tests how room lighting (bright vs. dim) and background music (present vs. absent) affect performance on a creativity task scored from 0 to 100. Each of 80 participants completes the task under one combination of lighting and music. H1: Bright lighting will produce significantly higher creativity scores than dim lighting.H2: The presence of background music will significantly increase creativity scores compared to silence.H3: The effect of lighting on creativity will significantly depend on whether music is present. Df Sum Sq Mean Sq F value Pr(>F) lighting 1 40 40 0.80 0.374 music 1 75 75 1.50 0.224 lighting:music 1 380 380 7.60 0.007 ** Residuals 76 3800 50 Which statistical model was used? [model] Was H1 accepted or rejected? [h1] Was H2 accepted or rejected? [h2] Was H3 accepted or rejected? [h3] Which graph matches the results? [graph]
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