X |
Y |
17 |
87 |
19 |
86 |
21 |
59 |
23 |
36 |
25 |
47 |
Find the means, medians, and SDs of each of the two variables (X and Y) in...
I am having trouble with this question, please show all work so I can understand. Thank you ! 1. Find the means, medians, and SDs of each of the two variables (X and Y) in the chart below. Make sure to show all of your work (15 points; 7.5 points each)
A stockbroker has kept a daily record of the value of a particular stock over the years and finds that prices of the stock form a normal distribution with a mean of $17.89 and a standard deviation of $5.27. The stock price beyond which 1% (01) of the distribution falls is- - --(7 points). 4. What is the value of r for the following relationship between X and Y (18 points)? 5. 87 17 19 86 21 59 36 23...
4. Suppose X and Y are two random variables with means ji and 42, respectively. (a) Find E(-X). (b) Find EaX + bY + c), where a, b, and care constants. (c) Show that VaraY) = a'Var(Y).
Consider the following data for a dependent variable y and two independent variables, 21 and 22. 21 22 30 12 95 47 11 108 25 18 113 51 16 178 40 5 94 52 20 176 74 7 171 36 12 118 59 13 142 77 16 211 Round your all answers to two decimal places. Enter negative values as negative numbers, if necessary. a. Develop an estimated regression equation relating y to @i. + 31 Predict y if *1...
Two random variables X and Y have means E[X] = 1 and E[Y] = 0, variances 0x2 = 9 and Oy2 = 4, and a correlation coefficient xx =0.6. New random variables are defined by V = -2X + Y W = 2X + 2Y Find the means of V and W Find the variances of V and W defined in question 3 Find Rww for the variables V and W defined in question 3
Given independent random variables, X and Y, with means and standard deviations as shown, find the mean and standard deviation of each of the variables in parts a to d. a) Xminus10 b) 0.5Y c) XplusY d) XminusY Mean SD X 60 13 Y 25 5 a) Find the mean and standard deviation for the random variable Xminus10. E(Xminus10)equals nothing SD(Xminus10)equals nothing (Type integers or decimals rounded to two decimal places as needed.)
For the two variables of interest: Create a scatter plot with Percent Time Asleep as the independent variable x and Longevity as the dependent variable y. The plot must include an informative title, along with correct labels for both axes. Include a plot of the least-squares equation (see #5 below). Calculate the correlation coefficient and the coefficient of determination. Identify any data points on the scatter diagram that appear to be influential. Use Cook's Distance > (4⁄√n) as the criterion...
Consider the following data for a dependent variable y and two independent variables, a1 and 2 Click on the datafile logo to reference the data. DATA file 30 12 94 47 10 108 25 17 16 112 178 51. 40 94 175 51 19 74 7 170 36 12 13 16 117 59 76 142 211 Round your all answers to two decimal places. Enter negative values as negative numbers, if necessary. a. Develop an estimated regression equation relating y...
Let X, Y be two independent exponential random variables with means 1 and 3, respectively. Find P(X> Y)
This is stat question and the data show as below This is stat question and the data show as below Flows in the Credit River in Mississauga are given in the file 'credit.MPJ' or in the file 'credit.xlsx'. C1 C2 Feb C3 C4 C5 April Lu 36 260 95 72 327 184 154 58 178 205 335 101 62 294 250 92 87 64 87 224 69 129 95 238 127 163 239 124 17 18 19 20 21 61...