7.124 Investigating the endowment effect, continued.

Refer to Exercise 7.26 (page 376). The group of researchers also asked these same 40 students from a graduate marketing course to consider a Vosges Oaxaca gourmet chocolate bar made with dark chocolate and chili pepper. Test the null hypothesis that there is no difference between the two prices. Also construct a 95% confidence interval of the endowment effect.