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(Solved) COMMON DATA ANALYSIS ASSIGNMENT FOR MTH 241 - STATISTICS I MTH 241 COMMON DATA ANALYSIS ASSIGNMENT (F2016) Previous studies have shown that urban bus...


Previous studies have shown that urban bus drivers have an extremely stressful job, and a large proportion of drivers retire prematurely with disabilities due to occupational stress. These stresses come from a combination of physical and social sources such as traffic congestion, incessant time pressure, and unruly passengers. In the paper, “Hassles on the Job: A Study of a Job Intervention with Urban Bus Drivers” (Journal of Organizational Behavior, Vol. 20, pp. 199 – 208), G. Evans et al. examined the effects of an intervention program to improve the conditions of urban bus drivers. Among other variables, the researchers monitored diastolic blood pressure of bus drivers in downtown Stockholm, Sweden. The data, in millimeters of mercury (mm Hg), are based on the blood pressures obtained prior to intervention for the 41 bus drivers in the study. 

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COMMON DATA ANALYSIS ASSIGNMENT FOR MTH 241 – STATISTICS I
MTH 241 COMMON DATA ANALYSIS ASSIGNMENT (F2016)
Previous studies have shown that urban bus drivers have an extremely stressful job, and a large
proportion of drivers retire prematurely with disabilities due to occupational stress. These stresses come
from a combination of physical and social sources such as traffic congestion, incessant time pressure,
and unruly passengers. In the paper, “Hassles on the Job: A Study of a Job Intervention with Urban Bus
Drivers” (Journal of Organizational Behavior, Vol. 20, pp. 199 – 208), G. Evans et al. examined the effects
of an intervention program to improve the conditions of urban bus drivers. Among other variables, the
researchers monitored diastolic blood pressure of bus drivers in downtown Stockholm, Sweden. The
data, in millimeters of mercury (mm Hg), are based on the blood pressures obtained prior to intervention
for 30 bus drivers in the study. See data below.
79
81
65 75
81
77 94
63
58 73
90
93 91
89
83 74
95
88 80
80
93 100
95
83 70
69
81 76
85
84 A. Exploratory Data Analysis
a. Summarize the data using a…
1. stem and leaf diagram.
2. histogram with approximately 6 classes.
1. Use class limits on the horizontal axis.
2. Use frequencies on the vertical axis.
3. Show class frequency on top of bars.
3. box and whiskers plot.
b. Investigate the data for definite outliers. Drop all definite outliers from the set
and redo part a.
c. Summarize the data set using a table of descriptive statistics. The table must be
generated by a statistical software and include the following statistics:
1. The number of observations in data set
2. Mean
3. Median
4. Mode
5. Max
6. Min
7. Quartiles
8. Interquartile range
9. Standard deviation
10. Variance
11. Range
12. Standard error of the mean
B. Inferential Statistics
a. Use a STATISTICAL SOFTWARE to construct a 90% confidence interval for µ, the
population mean diastolic blood pressure of all urban bus drivers in Stockholm . COMMON DATA ANALYSIS ASSIGNMENT FOR MTH 241 – STATISTICS I b. In adults the ideal diastolic blood pressure is 80 mm Hg. At the 5% significance
level, do the data provide sufficient evidence to conclude that the mean diastolic blood
pressure of bus drivers in Stockholm exceeds the normal diastolic blood pressure of 80
mm Hg? Have Software conduct the appropriate test. Using the software output, perform the full hypothesis test.
C. Project Summary & Findings
a. Write a brief introductory paragraph regarding the background of data.
b. Write paragraph (or two) that specifies the shape of the distribution of the data
and reference your graph(s) used to make your decision.
c. Discuss the presence or absence of outliers.
d. Interpret the following values within context for the sample mean, median, and
mode.
e. State the range of the data and the standard deviation.
f. State the practical interpretation for the 90% confidence interval.
g. State the null hypothesis, the test-statistic, and the p-value for the hypothesis
test in B).
h. Clearly state your conclusions of the hypothesis test within context and include
the significance level in your statement.
D. Format for submitting Statistics Project
a. First – page: Title page with appropriate project title, name, course number and
section number. (The title page must be typed.)
b. Part C)
c. Division Page for “METHODS”
d. Part A) – include all software Output.
e. Part B) – include all software Output.
f. How has this project helped you understand the purpose and value of the study
of statistics? Your response must be in complete sentences and may be
handwritten.

 


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