Question Question 5 10 pts A friend of yours has asked you to double check his statistical analysis. He computed a confidence interval for the difference between 2 population means. When you check his analysis, you realize that he used the wrong sample size for group 1 in the calculations. Which of the following will he need to change? The reported point estimate for the difference between the 2 population means The reported confidence interval The reported standard error The reported sample standard deviation of group 1

Let F(x) be the cumulative distribution function associated with a random variable X which assumes integer values only. Given that F(3) = 0.1, F(4) = 0.25, F(5) = 0.55, FO) = 0.83, F(7) = 0.91 and F(8) = 0.97, find Pr[5 < X <8]. O 1.03 O B..14 O c..42 O d..72 O E..97

find the surface Let f(x)=√x over the interval [1, 4]. Find the surface area of the surface generated by revolving the graph of f (x) about the x-axis. Round your answer to two decimals. YA 4- 3+ f(x)=√x 3+ f(x) = √x 2+ 2+ 1 1 6 X 이 -1 6 x -2 + -3+ -4 -2 O -1- -2+ -3+ 1 2 3 сл+ 4 5 -2 -1 1 1 1 1 2 3 4 5 삼

Determine the x-and y-coordinates of the centroid of the shaded area. Assume c = 6, a = 1.10, b = 1.90. = y 1 1 1 x 3 y=1+ © с ob- --X a b Answer: (1,5) = ( Locate the centroid of the shaded area. Set b= 0.40 a. y | *=a(1-1 y2 62 b * a Answer: (Ă, y) = ( Determine the x-and y-coordinates of the centroid of the shaded area. у | a | y = k2v x 1.20 a y = k123 Answers: (1. y) =(

Crich Corporation uses direct labor-hours in its predetermined overhead rate. At the beginning of the year, the estimated direct labor-hours were 21,940 hours and the total estimated manufacturing overhead was $530,948. At the end of the year, actual direct labor-hours for the year were 21,850 hours and the actual manufacturing overhead for the year was $530,948. Overhead at the end of the year was: (Round your Intermediate calculations to 2 decimal places.) Multiple Choice $2,228 underapplied $2,178 underapplied $2,178 overapplied $2,228 overapplied

For the following exercises, find the surface area of the volume generated when the following curves revolve around the y-axis. If you cannot evaluate the integral exactly, use your calculator to approximate it. 199. y = x2 from x = 0 to x = 2

For the following exercises, find the lengths of the functions of y over the given interval. If you cannot evaluate the integral exactly, use technology to approximate it. 181. y = 5 - 3x from y = 0 to y = 4 – 4