Question

Question 2

A study of the impact of graphical quality and age on time spent playing a computer game. Researchers record the time, in minutes, that children spent playing three computer games: one with minimal 2D graphics, one with high 2D graphic quality, and one with 3D graphic quality. Researchers also note the age group of each child: Under 10, 10 to 13, and over 13.

Write the null and alternative hypotheses for both factors and for their interaction.

Question 4

A study of the number of hits a video gets on YouTube based on the type of video (humorous, inspirational, musical, and informational) and on the length of the video (under 1 minute, 1 to 5 minutes, more than 5 but less than 10, 10 or more minutes).

Write the null and alternative hypotheses for both factors and for their interaction.

Answer 1

(4) Hypothesis for Graphic Quality

H0: There is no difference in the means of the three Graphic Qualities.

Ha: The mean of at least one graphic quality is different from the others.

Hypothesis for Age Group

H0: There is no difference in the means of the three Age Groups.

Ha: The mean of at least one age Group is different from the others.

Hypothesis for Interaction

H0: There is no between the factors, Graphic Quality and Age group.

Ha: There is an between the factors, Graphic Quality and Age group.

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(3) Hypothesis for Type of Video

H0: There is no difference in the means of the four types of videos.

Ha: The mean of at least one type of video is different from the others.

Hypothesis for Length of Video

H0: There is no difference in the means of the four lengths.

Ha: The mean of at least one length is different from the others.

Hypothesis for Interaction

H0: There is no between the factors, type of video and length of video.

Ha: There is an between the factors, type of video and length of video.

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