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 P.M.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:
Operant Response
A behavior that is modified by its consequences, such as through reinforcements or punishments, as described in operant conditioning.
Stimulus
An external event or change in the environment that can elicit or influence a physiological or psychological response.
Negative Punishment
The removal of a desirable stimulus following unwanted behavior in order to decrease the likelihood of that behavior happening again.
Fender Bender
A minor car accident primarily resulting in cosmetic damage to the vehicle, without significant injuries to the involved parties.
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