To determine whether a new drug designed to lower a person’s heart rate is effective or not, Dr. Johnson gives the medicine to a random sample of 100 patients with Rapid Heart Rhythm (RHR) and obtains a mean of 128.  Dr. Johnson knows the heart rate of the population of individuals with RHR is 135 with a standard deviation of 40.  What can the doctor conclude about the new drug?  Complete the steps to make a conclusion.   What kind of test is appropriate for this question? This is a one-tailed test? True or false.  H0:  µ_________135  HA: µ_________135  Use your table to find the correct critical value ________ Enter just the numerical part of the obtained value for this sample.

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A: Answer:-

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