Answer:
c
Step-by-step explanation:
a. If you double each entry on a list, that doubles the mean. TRUE
b. If you double each entry on a list, that doubles the SD. TRUE
c. If you add 5 to each entry on a list, that adds 7 to the SD. FALSE
d. If you change the sign of each entry on a list, that changes the sign of the mean. TRUE
Therefore the only False statement is option c.