Problem 1. (16 points) Consider the follow set of n = 5(x, y) pairs: x 2025...
Consider the follow set of ?=5 (?,?)(x,y) pairs: ?x 20 25 26 30 35 ?y 21 30 35 31 40 NOTE: SXX = 126.8, SXY = 139.6, SYY = 197.2, ?¯x¯ = 27.2, and ?¯y¯ = 31.4. Compute the sample correlation correct to three decimal places of accuracy. Correlation = ?=
Consider the follow set of ?=5 (?,?) pairs: ? 20 25 26 30 35 ? 21 30 35 31 37 NOTE: SXX = 126.8, SXY = 116.2, SYY = 152.8, ?¯ = 27.2, and ?¯ = 30.8. Compute the sample correlation correct to three decimal places of accuracy. Correlation = ?=
Problem 3. (16 points) Find the Z-score for a normal measurement that satisfies each of the following statements. (a) The point z with 11 percent of the observations falling below it. Z= (b) The closest point z with 44 percent of the observations falling above it. Note: You can earn partial credit on this problem. preview answers Problem 4. (17 points) A random sample of n = 80 in-coming college freshmen showed that 32 were planning to bring a car...
Consider the following small data set. x-11 y- 22 , x-15 y-16 , x-12 y-27 , x-6 y-26 ,x-5 y- 21 Find the linear correlation coefficient. r=
(1 point) Consider the following small data set. Subject x y 1 10 28 2 14 19 3 7 30 4 14 30 5 16 26 Find the linear correlation coefficient.
For the accompanying data set, (a) draw a scatter diagram of the data, (b) by hand, compute the correlation coefficient, and (c) determine whether there is a linear relation between x and y. Data Set x 2 4 6 6 7 y 4 8 10 14 19 Critical Values for Correlation Coefficient n 3 0.997 4 0.950 5 0.878 6 0.811 7 0.754 8 0.707 9 0.666 10 0.632 11 0.602 12 0.576 13 0.553 14 0.532 15 0.514 16...
A random variable X is said to follow a lognormal
distribution if Y = log(X) follows a normal
distribution. The lognormal is sometimes used as a model for
heavy-tailed skewed distributions.
please answer the follow:
110 15 60 5419 15 73 190 57 4344 18 37 43 55 19 23 82 175 50 80 65 63 36 6 10 17 52 43 70 22 95 20 4 17 15 12 29 29 6 22 40 17 26 30 16 116...
Consider the following small data set Subject x y 1 14 30 2 15 21 3 15 25 4 3 19 5 6 31 Find the linear correlation coefficient. r =
Consider the following set of ordered pairs. x 2 7 1 4 30 y 6 9 5 8 6 Assuming that the regression equation is y = 4.491 +0.679x and that the SSE = 1.0189, construct a 95% confidence interval for the slope. Click here to see the t-distribution table, page 1 Click here to see the t-distribution table, page 2 Construct a 95% confidence interval for the slope. LCL = and UCL = (Round to three decimal places as...
please provide the correct answer
1. As the speed (in miles per hour) of an automobile increases, the gas mileage (in miles per gallon) first increases and then decreases. Suppose that this relationship is very regular, shown by the following data table and scatterplot. as Speed 30 40 50 60 70 Mileage 20 24 26 24 20 mileage 26 25 24 23 22 21 201 30 40 50 60 70 speed Why would we not want to compute a correlation...