Siegel (1990) found that elderly people who owned dogs were less likely to pay visits to their doctors after upsetting events than were those who did not own pets. Similarly, consider the following hypothetical data. A sample of elderly dog owners is compared to a similar group (in terms of age and health) who do not own dogs. The researcher records the number of doctor visits during the past year for each person. The data are as follows. Control group:10,8,7,9,13,7,6,12 Dog owners: 7, 4,9,3,7 a. In words and symbols, state the null hypothesis and the alternative hypothesis using a two-tailed test. By hand, compute the degrees of freedom and report the appropriate critical value for a two-tailed test at the α < .05 level. By hand, compute the SS for both groups. By hand, compute the pooled variance for these data. By hand, compute the appropriate test to determine if significant differences occur between these groups. By hand, calculate the appropriate statistical test to determine whether owning a dog has a significant effect on doctor’s visits. Interpret the assumptions for the test. Interpret your findings. Does dog ownership significantly increase or decrease doctor’s visits? Be sure to include the statistical sentence.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section4.5: Correlation And Causation

Problem 11PPS

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Siegel (1990) found that elderly people who owned dogs were less likely to pay visits to their doctors after upsetting events than were those who did not own pets. Similarly, consider the following hypothetical data. A sample of elderly dog owners is compared to a similar group (in terms of age and health) who do not own dogs. The researcher records the number of doctor visits during the past year for each person. The data are as follows.
Control group:10,8,7,9,13,7,6,12
Dog owners: 7, 4,9,3,7
1. a. In words and symbols, state the null hypothesis and the alternative hypothesis using a two-tailed test.
2. By hand, compute the degrees of freedom and report the appropriate critical value for a two-tailed test at the α < .05 level.
3. By hand, compute the SS for both groups.
4. By hand, compute the pooled variance for these data.
5. By hand, compute the appropriate test to determine if significant differences occur between these groups.
6. By hand, calculate the appropriate statistical test to determine whether owning a dog has a significant effect on doctor’s visits. Interpret the assumptions for the test.
7. Interpret your findings. Does dog ownership significantly increase or decrease doctor’s visits? Be sure to include the statistical sentence.

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