Answer Happy

In a test of the effectiveness of garlic for lowering cholesterol, 45 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes (before-after) in their levels of LDL cholesterol (in mg/dL) have a mean of 3.4 and a standard deviation of 16.6. Construct a 95% confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment. What does the confidence interval suggest about the effectiveness of garlic in reducing LDL cholesterol? Click here to view at distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table, OCCER What is the confidence interval estimate of the population mean u? mg/dL <<mg/dl. (Round to two decimal places as needed.) What does the confidence interval suggest about the effectiveness of the treatment? A. The confidence interval limits do not con suggesting that the garlic treatment did affect the LDL cholesterol levels. OB. The confidence interval limits contain 0, suggesting that the garlic treatment did affect the LDL cholesterol levels. OC. The confidence interval limits do not contain 0, suggesting that the garlic treatment did not affect the LDL cholesterol levels. D. The confidence interval limits contain 0, suggesting that the garlic treatment did not affect the LDL cholesterol levels. Time Remaining: 02:43:53 Next
In at meat devia confi Click Click Click Wha 10- (Rou Wha OA OE 0000 Cumulative area to the left of negative z scores NEGATIVE z Scores N -3.50 and lower -3.4 -3.3 -3.2 <-3.1 -3.0 9 Standard Normal (z) Distribution: Cumulative Area from the LEFT .00 0001 0003 0005 0007 0010 0013 .01 0003 0005 0007 0009 0013 Print .02 0003 0005 0006 .0009 0013 .03 0003 0004 0006 0009 0012 Done 04 .0003 0004 0006 0008 0012 05 0003 0004 0006 0008 0011 .00 0 888
STAT-1P98-Spring-2022-ASY ||| in a meas devia conf Click Click Click Wha 0 (Rou Wha OA 0000 Od D Cumulative area to the left of positive z scores .00 5000 5398 5793 6179 6554 z Cumulative Area from the LEFT .01 5040 5438 5832 6217 .6591 .02 5080 5478 5871 6255 6628 POSITIVE z Sc Print .03 5120 5517 5910 6293 6664 Done Amran Hassan Adam 07/09/22 12:16 PM 04 5160 5557 5948 6331 6700 This test: 41 point(s) 05 5199 5596 5987 6368 6736 .06 5239 .5636 6026 .6406 6772 X
Critical t values a 4 Critical t value (negative) Left tail Degrees of Freedom 1 2 4 5 7 8 9 10 11 12 13 t Distribution: Critical f Values 0.005 0.01 63.657 9.925 5.841 4.604 4.032 3.707 3.499 3.355 3.250 3.169 3.106 3.055 3.012 0.01 0.02 31.821 6.965 4.541 3.747 3.365 3.143 2.998 2.896 2.821 2.764 2.718 2.681 2.650 I Area in One Tail 0.025 Area in Two Tails 0.05 12.706 4.303 3.182 2.776 2.571 2.447 2.365 2.306 2.262 2.228 2.201 2.179 2.160 X