uiz: Quiz # 7 ( Ch 9 ) Subm This Quiz: 6 pts p hen subjects were treated with a

Question

uiz: Quiz # 7 ( Ch 9 ) Subm This Quiz: 6 pts p hen subjects were treated with a drug, their systolic blood pressure readings (in mm Hg) were measured before and after the drug was taken Resuts are given i s Question: 1 pt 3 of 6 he table below. Assume that the paired sample data is a simple random sample and that the differences have a distibution that is approximately normat Using a O ignificance level, is there sufficient evidence to support the claim that the drug is effective in lowering systol ic blood pressure? Before 155 187 195 158188 204 168 179 188 25 164 157 176 159 179 184 177147 173 143 148 152 156 180 In this example, Pa is the mean value of the diferences d for the population of all pairs of data, where each individual dfference d is defined as the systolie blood pressure reading before the drug was taken minus the reading aher the drug was taken. What are the null and altenative hypotheses for the hypothesis test? identhy the test statistic (Round to two decimal places as needed ) dentily the P-value p-value-(Round to three decimal places as needed ) Since the P.value lsthan the significance level systolic blood pressure H There is evidence to support the claim that the drug is effective in lowering Click to select y answers) Save for Later Chapter 1 Pre-Test acer idercs to wwarrt Wording of Final osion F ail to

Explanation / Answer

The statistical software output for this problem is:

Paired T hypothesis test:
D = 1 - 2 : Mean of the difference between Before and After
H0 : D = 0
HA : D > 0
Hypothesis test results:

Hence,

Hypotheses: Option B is correct.

t = 2.69

p - Value = 0.010

Less than; Reject; Sufficient

Difference Mean Std. Err. DF T-Stat P-value Before - After 14.5 5.3830542 11 2.6936381 0.0104

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