Look at the following table and discuss what we have found.

Return to the first table in the chapter (Table 10.1), the one about race and sleep, and compare it to the one shown above about class and sleep. Answer the following questions, thinking about how you would explain results:

a) Did the researchers find a significant difference in the sleep of upper- and lower-income students, and how do you know?

b) What percent of students in the upper-income category report getting six or more hours sleep?

c) How do we know from Table 10.1 that race3 is a significant predictor of whether a person got six hours of sleep or less than that? Explain.

d) I find these results about sleep and race and sleep and class a bit surprising. Can you suggest a new variable that might help us to understand this finding – a variable we might want to add to a new version of the survey?

Figure 10.1:-

Transcribed Image Text:

Table 10.22. Hours of sleep (SLEEPNUM) by higher or lower income (CLASS2), from the Study Habits data set Frequency table: sleepnum 6 or more less than 6 Column percentages: sleepnum 6 or more less than 6 Total Count Pearson's Chi-squared test X-squared = 5.6666, df=1, p-value = 0.01729 class2 higher-income lower-income 19 8 8 14 class2 higher-income lower-income 70.4 36.4 29.6 63.6 100.0 100.0 27.0 22.0