If a Texas college student has had phone service switched without approval or has had unauthorized charges on a phone bill, the _____ represents a possible solution to the problem

How might rally events affect presidential politics?

a. Rally events lead to drops in presidential approval ratings, making passage of their agendas more difficult. b.Rally events cause a long-term increase in presidential approval ratings, practically guaranteeing reelection. c. Rally events make presidents more politically cautious. d. Rally events tend to temporarily increase presidential approval ratings, providing presidents with a window of opportunity to press their agenda.

The null hypothesis is represented by the symbol H0

Indicate whether the statement is true or false