The weight of a .5 cubic yard bag of landscape mulch in uniformly ...

[lilldybug07]

The weight of a .5 cubic yard bag of landscape mulch in uniformly distributed over the interval from 38.5 to 41.5 pounds.
 a. Give a mathematical expression for the probability density function.
  b. What is the probability that a bag will weigh more than 40 pounds?
  c. What is the probability that a bag will weigh less than 39 pounds?
  d. What is the probability that a bag will weigh between 39 and 40 pounds?

Question 2

In a multiple regression analysis involving 12 independent variables and 166 observations, SSR = 878 and SSE = 122 . The coefficient of determination is
 a. 0.1389
  b. 0.1220
  c. 0.878
  d. 0.7317

[SamMuagrove]

Answer to Question 1

a. f(x) = 1/3 for 38.5  x  41.5
= 0 otherwise
b. .5000
c. .1667
d. .3333

Answer to Question 2

C

[lilldybug07]

Excellent

[rachel]

Thanks for the timely response, appreciate it