When conducting a t test for independent means, a typical null hypothesis is that the mean of Population 1 equals the mean of __________

According to research about child care in Sweden presented in the text, the majority of the need for child care for Swedish children is met by:

a. paying mothers to stay at home until the child is ready to attend public schools b. extended families c. private for-profit businesses which are paid for through employment taxes d. a publicly funded child-care system

It is obvious to everyone that Jane is cheerful; therefore, "cheerfulness" is a source trait

Indicate whether the statement is true or false.