True or False When the population standard deviations are unknown ...

[mynx]

True or False When the population standard deviations are unknown and are not assumed to be equal, s1 and s2 must be used to estimate their respective population standard deviations, 1 and 2.
  Indicate whether the statement is true or false

Question 2

True or False When the population standard deviations are unknown and not assumed to be equal, pooling the sample standard deviations into a single estimate of their common population value is no longer applicable.
  Indicate whether the statement is true or false

[djofnc]

Answer to Question 1

T

Answer to Question 2

T