Share
Explore BrainMass

Statistics: Reaction time for groups of dogs

An animal trainer obtained the following sample data (Table A) in a study of reaction times of dogs (in seconds) to a specific stimulus. He then selected another group of dogs that were much older than the first group and measure their reaction times to the same stimulus. The sample data is shown in Table B.

Table A Table B Classes
Frequency

Classes Frequency Classes Frequency
2.3-2.9 35
2.3-2.9 30

3.0-3.6 23 3.0-3.6 26

3.7-4.3 5 3.7-4.3 26

4.4-5.0 4 4.4-5.0 1

5.1-5.7 24 5.1-5.7 6

5.8-6.4 15 5.8-6.4 28

Find the variance and standard deviation for the two distributions above. Compare the variation of the data sets. Decide if one data set is more variable than the other.

You are given the following data. Number of Absences Final
Grade
0 96
1 92
2 71
2 71
3 78
3 66
4 60
5 51
6 42

?Make a scatter plot for the data; submit it through the Dropbox.
?Find the correlation coefficient for the data.
?Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days.

I just need help plotting on the graph.

Solution Preview

See the attached file.

An animal trainer obtained the following sample data (Table A) in a study of reaction times of dogs (in seconds) to a specific stimulus. He then selected another group of dogs that were much older than the first group and measure their reaction times to the same stimulus. The sample data is shown in Table B.
Table A Table B
Classes Frequency ...

Solution Summary

Reaction time for groups of dogs in statistics is examined.

$2.19