Question

# A research team is interested in investigating the effectiveness of a new medication intended to reduce...

A research team is interested in investigating the effectiveness of a new medication intended to reduce resting heart rate (beats per minute, BPM) in overweight patients. In order to test the medication, the researcher organizes a clinical trial with participants randomly assigned to receive either the new medication or a placebo. Suppose the following table represents the heart rates for a SRS from both groups.

 Placebo Group Treatment Group 71 67 71 66 68 64 67 64 68 65 69 64 70 59 70 63 69 71 72 64 73

A) Calculate the standard error for the difference in average heart rate between the groups.

B) Calculate the pooled standard error for the difference in average heart rate assuming equal variances.

 a. SE=1.114 b. SE=1.088 a. SE=2.441 b. SE=2.119 a. SE=2.003 b. SE=1.654

 Placebo treatment x1    = 69.82 x2      = 64.70 s1    = 1.83 s2      = 3.06 n1    = 11 n2     = 10

A)

 standard error se=√(S21/n1+S22/n2)= 1.114

B)

 Pooled Variance Sp2=((n1-1)s21+(n2-1)*s22)/(n1+n2-2)= 6.1967
 standard error se =Sp*√(1/n1+1/n2)= 1.088

correct option is:

a. SE=1.114

b. SE=1.088

#### Earn Coins

Coins can be redeemed for fabulous gifts.