The shift supervisor at a local manufacturing plant collected ...

[jwb375]

The shift supervisor at a local manufacturing plant collected data on the number of defects coming off an assembly line over the past eight weeks (40 work days). She summarized the data in the following frequency table.
 
   of Errors 0 1 2 3 4 5
   of Weeks 1 4 7 16 10 2
 
  What is the weighted average number of errors per night?

Question 2

What is the width of the interval?
 
  A) 4.86
  B) 2.56
  C) 3.24
  D) 6.48

[ally]

Answer to Question 1

Weighted mean = 2.9

Answer to Question 2

C