Why is a value obtained by measuring something considered ...

[stephzh]

Why is a value obtained by measuring something considered inexact?
 
  A) Manufactured tools for measuring objects are all invalid.
  B) Measured objects are likely to change over time.
  C) The process of measuring can only be accurately performed by machines.
  D) There is an inherent uncertainty involved in making measurements.

Question 2

How does one calculate the mean of a data set?
 
  A) Add all the values together and divide the sum by the number of values.
  B) Add the largest and smallest value and divide the sum by 2.
  C) Add the two largest values and divide the sum by the number of values.
  D) Add the two middle values and divide the sum by 2.

[maya.nigrin17@yahoo.com]

Answer to Question 1

D

Answer to Question 2

A

[stephzh]

Thank you

[maya.nigrin17@yahoo.com]

Happy to help you