The paper “If It’s Hard to Read, It’s Hard to Do” (Psychological Science : 986–988) described an interesting study of how people perceive the effort required to do certain tasks. Each of 20 students was randomly assigned to one of two groups. One group was given instructions for an exercise routine that were printed in an easy-to-read font (Arial). The other group received the same set of instructions, but printed in a font that is considered difficult to read (Brush). After reading the instructions, subjects estimated the time (in minutes) they thought it would take to complete the exercise routine. Summary statistics are given below.
The authors of the paper used these data to carry out a two-sample t test, and concluded that at the .10 significance level, there was convincing evidence that the mean estimated time to complete the exercise routine was less when the instructions were printed in an easy-to-read font than when printed in a difficult-to-read font. Discuss the appropriateness of using a two-sample t test in this situation.
Answer to relevant QuestionsKey terms in survey questions too often are not well understood, and such ambiguity can affect responses. As an example, the article “How Unclear Terms Affect Survey Data” (Public Opinion Quarterly : 218– 231) ...The report referenced in the previous exercise (“Fatality Facts 2004: Bicycles”) also classified 719 fatal bicycle accidents according to the month in which the accident occurred, resulting in the accompanying table. a. ...The paper “Contemporary College Students and Body Piercing” (Journal of Adolescent Health : 58–61) described a survey of 450 undergraduate students at a state university in the southwestern region of the United ...The paper “Credit Card Misuse, Money Attitudes, and Compulsive Buying Behavior: Comparison of Internal and External Locus of Control Consumers” (College Student Journal : 268–275) describes a study that surveyed ...The following passage is from the paper “Gender Differences in Food Selections of Students at a Historically Black College and University” (College Student Journal : 800–806): Also significant was the proportion ...
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