A PTA group wishes to determine whether a barrage of letters sent to the local station has reduced the amount of violence broadcast between the hours of 4 and 9 P.M. The results of a survey of viewers are given here. 
Carry out a sign test to determine whether or not the letters were effective in reducing the amount of violence during the 4 to 9 p.m. period. Use a .05 level of significance. Be sure to state the null and alternative hypotheses.
Definitions:
Emotionally Unstable
A term describing individuals who experience rapid, intense emotional changes that are unpredictable and can affect their behavior.
Expressing Anger
The act of recognizing and communicating feelings of anger in a healthy and constructive manner.
Temperament
The innate or naturally occurring patterns of personal behavior, mood, and emotional responses.
Predisposition
An inclination or tendency to behave in a certain way, often influenced by genetic or environmental factors.
Q12: Using exponential smoothing, the demand forecast
Q12: The control limits for an x-bar chart
Q21: Consumer's risk is<br>A)the same concept as the
Q32: Which of the following is characteristic of
Q37: The second stage of a two-stage acceptance
Q41: A test to determine whether or not
Q54: A sample of 5 clusters is to
Q57: The mathematical equation that explains how
Q60: In a sample of 120 people, 50
Q61: In a multiple regression model, the