average, the reduction in systolic blood pressure is 28.8 for a sample of size 697 and standard deviation 20.4. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 90% confidence level). Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). Answer ould be obtained without any preliminary rounding. 2Calculator Submit Question 13,867 FEB 14 étv EE

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The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on
average, the reduction in systolic blood pressure is 28.8 for a sample of size 697 and standard
deviation 20.4.
Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 90%
confidence level).
Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample
statistics are reported accurate to one decimal place).
Answer should be obtained without any preliminary rounding.
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13,867
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14
étv
Transcribed Image Text:The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 28.8 for a sample of size 697 and standard deviation 20.4. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 90% confidence level). Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). Answer should be obtained without any preliminary rounding. Z Calculator Submit Question 13,867 FEB 14 étv
Expert Solution
Step 1

We have given that 

Sample n=697

Sample mean =28.8

Standard deviation =20.4

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