A researcher wishes to determine whether people with high bloodpressure can redu

Question

A researcher wishes to determine whether people with high bloodpressure can reduce their blood pressure by the following aparticular diet. Use the sample data below to construct 90%confidence interval for m1-m2 where m1 and m2 represent the meanfor the treatment group and the control group respectively. Assumeequal population standard deviations and interpret theinterval.

Treatmentgroup            Control group

n1=40                            n2=80

x1=189.1                        x2=203.7

s1=38.7                           s2=39.2

Would you say the following?

(-26.76,-2.44) since all of the values in the interval arenegative , we conclude that the mean blood pressure for those onthe diet is less than for those not on the diet.

Which one is the correct on

(26.34, -2.86)

(-26.98, -2.22)

(-26.76, -2.44)

How did you figure the steps out if you do mind showing me?

Thank you

Explanation / Answer

Two-Sample T-Test andCI

Sample  N      Mean       StDev   SEMean
1           40     189.1       38.7         6.1
2           80     203.7       39.2         4.4

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