Question

statistics help from anyone?? please?

Answer 1

In a competitive sports video recorders have been used more frequently in recent years. The idea behind the recorder is that coaches can replay the training sessions for more effective feedback to the athlete. Some people believe video recording may make the athletes more nervous and actually decrease their performance. You have been asked to design an experiment to address this issue the accuracy of tennis serves as your response variable, and the number of successful serves out of 100 as your performance measure. The subjects for your experiment are 60 high school male competitive tennis players of varying ability who have volunteered for the experiment.

A) describe the treatments in your experiment.
B) One possible confounding variable is the experience levels of the players. Explain how you would control this variable.
C) Can the results of this experiment the generalized to all male tennis players

Answer 2

you have sampled 60 players :

the treatments can be :-
First group : use video recorders for 30 players
Second group : do not use video recorders for 30 players

Answer 3

for part B :
you can control the confounding variable (experience levels) by "random assignment" of players across both the groups. By randomly assigning subjects, you're sure that almost almost same proportion of experienced players fall in both groups

Answer 4

for part C :
you sampled your subjects from high school players ! they dont represent all the male tennis players. this experiment suffers from "convenience sample bias".
To generalize to all male tennis players, you need to take simple random sample from all tennis male players.
So, in summary, you cannot generalize the results to all tennis male players

Answer 5

let me knw if smthing doesnt make sense