Refer to the previous exercise about the study of the relationship between sleep apnea and hypertension. Suppose that the observed cell counts were actually three times as big as those reported in the original study.

For parts (a)€“(c): How, if at all, would the values of the following change?

a. The expected cell counts:  Increase Decrease Stay the same

b. The p-value:  Increase Decrease Stay the same

c. The chi-square statistic:  Increase Decrease Stay the same

d. Would the evidence in support of an association between sleep apnea and hypertension for people such as the ones in the study be stronger or weaker compared to the original study? Explain how you are deciding.

Data from previous exercise

In a study of the relationship between sleep apnea and hypertension (New England Journal of Medicine, 2000), researchers Peppard et al. categorized the participants by the severity of sleep apnea at the beginning of the study, and four years later recorded whether or not the participant had hypertension. Here is the table of the summarized data:

Transcribed Image Text:

Severity of sleep apnea Not Somewhat Severe Very Total 277 Yes 32 40 40 142 32 63 Severe hypertension? 69 27 132 67 No No 155 616 365 893 Total 187 507