*(PLS)* ANSWER, I GIVE RATINGS *(PLS)*
The authors of a paper titled "Age and Violent Content Labels
Make Video Games Forbidden Fruits for Youth" carried out an
experiment to determine if restrictive labels on video games
actually increased the attractiveness of the game for young game
players.
Participants read a description of a new video game and were asked
how much they wanted to play the game. The description also
included an age rating. Some participants read the description with
an age restrictive label of 7+, indicating that the game was not
appropriate for children under the age of 7. Others read the same
description, but with an age restrictive label of 12+, 16+, or
18+.
The summary data shown below are the ratings of 12- to 13-year-old
boys for how much they wanted to play the game on a scale of 1 to
10. You can assume that boys were assigned at random to one of the
four age label treatments (7+, 12+, 16+, 18+) and that ratings were
normally distributed.
Group | Sample Size | Sample Mean | Sample Std Dev |
18+ label | 23 | 8 | 1.52 |
16+ label | 20 | 6.5 | 1.61 |
12+ label | 18 | 6 | 1.45 |
7+ label | 19 | 5.1 | 1.86 |
H0:
The sum of all data in the data set is
N = 23+20+18+19 = 80
The grand mean is
Now,
Since there are 4 different groups so we have k=4. Therefore degree of freedoms are:
-------------
Now
F test statistics is
So p-value of the test using excel function "=Fdist(11.9541, 3, 76)" is 0.0000.
Since p-value is less than 0.05 so we cannot conclude that population mean is same for all ages.
Get Answers For Free
Most questions answered within 1 hours.