f. Americans are incorporating a wide range of digital tools and platforms into
ID: 3071534 • Letter: F
Question
f. Americans are incorporating a wide range of digital tools and platforms into their purchasing decisions and buying habits, according to a Pew Research Center survey of U.S. adults. The survey finds that roughly eight-in-ten Americans are now online shoppers: 79% have made an online purchase of any type, while 51% have bought something using a cellphone and 15% have made purchases by following a link from social media sites. When the Center first asked about online shopping in a June 2000 survey, just 22% of Americans had made a purchase online. In other words, today nearly as many Americans have made purchases directly through social media platforms as had engaged in any type of online purchasing behavior 16 years ago.
g. To check the effect of cold temperatures on the elasticity of two brands of rubber bands, one box of Brand A and one box of Brand B are tested. Ten bands of Brand A are kept in the freezer for 2 hours, and ten bands of Brand B are kept at room temperature for two hours. The amount of stretch before breakage is measured for each rubber band, and the mean for the cold bands are compared to the mean of the others. Is this a good experimental design? Explain your reasoning.
Explanation / Answer
G) The temperature on the elasticity may vary from one band to another. As we are conducting the experiment - effect of cold temperature on the elasticity of two brands of rubber bands A and B. The temperature in the freezer is different from the room temperature. As the experiment was not conducted at the uniform conditions, we can not consider this as a good experiment.
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