In a test of effectiveness of garlic for lowering cholesterol, 50 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment. The changes in their levels of LDL cholesterol in (mg/dL) has a mean of 0.5 and a standard deviation of 22.0. Construct a 95% confidence interval estimate of the standard deviation of the changes in LDL cholesterol after the garlic treatment. Assume that the sample is a simple random sample obtained from a population with a normal distribution.

Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola

Which graph shows the solution to the system of linear inequalities? y-4t< 4 y

Aconcession manager at yankee stadium wants to know how temperature affects beer sales. she took a sample of 10 games and recorded the number of beers sold and the temperature in the middle of the game. temperature 80 68 78 79 87 74 86 92 77 84 number of beers 20533 1439 13829 21286 30985 17187 30240 87596 9610 28742 a. draw a scatter plot of the data. b. the manager estimates the regression equation to be: numberofbeers = −100, 678 + 1, 513 ∗ temperature draw this on your scatter plot. c. for one of the estimated points, indicate the residual with ei . d. for that same point, indicate what part of the variation is explained by the model with ˆyi − y¯.