A pharmaceutical company wants to know whether an experimental drug has an effect on systolic blood pressure. Fifteen randomly selected subjects were given the drug and, after sufficient time for the drug to have an impact, their systolic blood pressures were recorded. The data appear below: 172140123130115 148108129137161 123152133128142172140123130115 148108129137161 123152133128142 Calculate the values of y¯¯¯y¯ and s for the 15 blood pressure readings.

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A pharmaceutical company wants to know whether an experimental drug has an effect on systolic blood pressure. Fifteen randomly selected subjects were given the drug and, after sufficient time for the drug to have an impact, their systolic blood pressures were recorded. The data appear below:

172140123130115 148108129137161 123152133128142172140123130115 148108129137161 123152133128142

Calculate the values of

y¯¯¯y¯

and s for the 15 blood pressure readings.

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