QUESTION 1

Listed below are systolic blood pressure measurements (in mm Hg) obtained from the same woman. Find the regression equation, letting the right arm blood pressure be the predictor (x) variable. Find the best predicted systolic blood pressure in the left arm given that the systolic blood pressure in the right arm is 95 mm Hg. Use a significance level of 0.05.

Right Arm Left Arm

102 174

101 169

93 148

77 147

77 148

Critical Values of the Pearson Correlation Coefficient r

NOTE: To test Upper H 0: rhoequals0 against Upper H 1: rhonot equals0, reject Upper H 0 if the absolute value of r is greater than the critical value in the table.

na=0.05a=0.01

40.9500.990

50.8780.959

60.8110.917

70.7540.875

80.7070.834

90.6660.798

100.6320.765

110.6020.735

120.5760.708

130.5530.684

140.5320.661

150.5140.641

160.4970.623

170.4820.606

180.4680.590

190.4560.575

200.4440.561

250.3960.505

300.3610.463

350.3350.430

400.3120.402

450.2940.378

500.2790.361

600.2540.330

700.2360.305

800.2200.286

900.2070.269

1000.1960.256

The regression equation is ^y =____+_____X

(Round to one decimal place as needed.)