MARYVILLE SOSC341 2022 July Assignment - Histograms & Other Graphs Latest

SOSC341 Understanding Statistical Inference

Assignment   Histograms & Other Graphs

Complete the following problems using what we have learned in class to this point. You may complete these problems on a sheet of paper and submit of picture of your work or using a tablet or computer (writing out the problems that require math). The task is not to use computer software or applications to answer the questions but to complete them by hand. You will be graded based on completing each problem (or attempting to do so) but also the accuracy of your responses. If you have questions pertaining to these questions or anything in the class, please contact me and ask.

Review the videos in your Module Resources and Tutorials 1 before completing this assignment.

Assignment

Students in an introductory psychology course were asked to participate in an experiment examining the relationship between quality of sleep and perceived stress. Each student in the class kept track of the quality of his or her sleep for seven consecutive days using a 5-point scale where 1 indicated very poor quality, 3 indicated average quality, and 5 indicated excellent sleep quality for the previous night. At the end of the week, each student donated a small hair sample consisting of approximately 20 to 30 strands of hair. The level of cortisol in the hair sample was obtained (in nanograms per gram of hair). Higher levels of cortisol indicate higher levels of stress. The table below shows the raw data from the 50 students in the study.

Hair cortisol level (in ng/g) and sleep quality ratings (1-5)

ID            Sleep Quality     Cortisol ID            Sleep Quality     Cortisol ID            Sleep Quality     Cortisol ID            Sleep Quality                Cortisol

1              3              136         16           4              103         31           3              79           46           1              35

2              3              74           17           4              31           32           2              105         47           5              166

3              3              143         18           4              81           33           3              145         48           5              83

4              4              137         19           4              97           34           1              48           49           1              165

5              1              107         20           2              151         35           1              194         50           2              51

6              2              136         21           3              140         36           2              174                                        

7              1              151         22           4              97           37           2              99                                          

8              1              177         23           4              109         38           2              28                                          

9              5              140         24           3              199         39           4              130                                        

10           3              61           25           3              69           40           4              148                                        

11           2              41           26           4              26           41           5              179                                        

12           5              189         27           1              112         42           5              189                                        

13           2              79           28           3              201         43           3              129                                        

14           2              43           29           2              34           44           2              80                                          

15           2              170         30           2              110         45           1              79                                          

 Use the data to answer the following questions:

Create frequency distributions of both the sleep quality and cortisol levels.

Draw a graph showing the distribution of sleep quality in the sample.

Draw a graph showing the distribution of cortisol in the hair sample.