Children’s perceptions of their neighborhood. In Health Education Research (Feb. 2005), nutrition scientists atDeakin University (Australia) investigated children’s perceptionsof their environments. Each in a sample of147 ten-year-old children drew maps of their home andneighborhood environment. The researchers examined themaps for certain themes (e.g., presence of a pet, television in the bedroom, opportunities for physical activity). The results, broken down by gender, for two themes (presence of a dog and TV in the bedroom) are shown in the tables below and saved in the MAPDOG and MAPTV files, respectively .
a. Find the sample proportion of boys who drew a dog on their maps.
b. Find the sample proportion of girls who drew a dog on their maps.
c. Compare the proportions you found in parts a and b . Does it appear that the likelihood of drawing a dog on the neighborhood map depends on gender?
d. Give the null hypothesis for testing whether the likelihood of a drawing a dog on the neighborhood map depends on gender.
e. Use the MINITAB printout (below) to conduct the test mentioned in part d at α = .05.
f. Conduct a test to determine whether the likelihood of drawing a TV in the bedroom is different for boys and girls. Use α = .05.
Presence of a Dog | Number of Boys | Number of Girls |
Yes | 6 | 11 |
No | 71 | 59 |
Total | 77 | 70 |
Presence of TV in Bedroom | Number of Boys | Number of Girls |
Yes | 11 | 9 |
No | 66 | 61 |
Total | 77 | 70 |
Based on Hume, C., Salmon, J., and Ball, K. “Children’s perceptions of their home and neighborhood environments, and their association with objectively measured physical activity: A qualitative and quantitative study,” HealthEducation Research , Vol. 20, No. 1, February 2005.
MINITAB output
Results of Voter Preference Survey
Candidate | ||
1 | 2 | 3 |
61 votes | 53 votes | 36 votes |
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