When you get a surprisingly low price on a product do you assume that you got a

Question

When you get a surprisingly low price on a product do you assume that you got a really good deal or that you bought a low-quality product? Research indicates that you are more likely to associate low price and low quality if someone else makes the purchase rather than yourself (Yan and Sengupta, 2011). In a similar study, n=16 participants were asked to rate the quality of low-priced items under two scenarios: purchased by a friend or purchased yourself. The results produced a mean difference of MD =2.6 and SS=135 with self-purchases rated higher.

Is the judged quality of objects significantly different for self-purchases than for purchases made by others? Use a two-tailed test with alpha=0.05

Compute Cohen’s d to measure the size of the treatment effect.

Explanation / Answer

std deviation =(SS/(n-1))1/2 =3

here std error =std deviation/(n)1/2 =0.75

hence trest stat t=(X-mean)/std error =2.6/0.75=3.4666

for above test p value =0.0035

as p value is ;ess then 0.05 level, we reject null hypothesis; and conclude that there is significant difference

Cohen d =diffenrce/std deviation=2.6/3 =0.867

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