In a drug trial, Merck was interested in deciding whether, in the range 40 to 80 mg, the dosage of a blood pressure medication was a significant source of variation in the systolic blood pressure reading. Three randomly selected groups of patients, one at 40 mg, one at 60, and one at 80mg were followed for a 2-month period and the average daily systolic reading was recorded for each. We wish to run Anova. Here is the statistical summary SUMMARY Average Variance 125.75 133.71 Count Sum Groups 40 mg 60 mg 1006 74.90 936 80.45 80 mg 10 1201 120. 10 68.32 Q: Which is closest to the value of X? Oa 125.72 Ob126.52 Oc 130.44 6d 123.18 Oe.74.56

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In a drug trial, Merck was interested in deciding whether, in the range 40 to 80 mg, the dosage of a blood pressure
medication was a significant source of variation in the systolic blood pressure reading. Three randomly selected groups of
patients, one at 40 mg, one at 60, and one at 80mg were followed for a 2-month period and the average daily systolic
reading was recorded for each, We wish to run Anova. Here is the statistical summary.
SUMMARY
Groups
Count
Sum
Average Variance
40 mg
1006
125.75
8.
74.90
60mg
936
133.71
80.45
80 mg
10
1201
120.10
68.32
Q: Which is closest to the value of x ?
Oa 125.72
Ob.126.52
Oc 130.44
d. 123.18
Oe 74.56
Transcribed Image Text:In a drug trial, Merck was interested in deciding whether, in the range 40 to 80 mg, the dosage of a blood pressure medication was a significant source of variation in the systolic blood pressure reading. Three randomly selected groups of patients, one at 40 mg, one at 60, and one at 80mg were followed for a 2-month period and the average daily systolic reading was recorded for each, We wish to run Anova. Here is the statistical summary. SUMMARY Groups Count Sum Average Variance 40 mg 1006 125.75 8. 74.90 60mg 936 133.71 80.45 80 mg 10 1201 120.10 68.32 Q: Which is closest to the value of x ? Oa 125.72 Ob.126.52 Oc 130.44 d. 123.18 Oe 74.56
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