Statistics
Group 9
Dianna Cadet
Chris Coleman
Heidi Schroeter
Chris Coleman
Confidence Intervals
Semesters Completed
In this survey of 28 P.B.S.C students, an inference was made from the
population mean of how many hours a student worked weekly. The
results are as follows:
Mean: 3.25
Standard deviation: 2.33
I can say with 95% confidence that the population mean of semesters
completed falls between the range of:
2.346521 < mean 6.45(claim)
6.45
Sample mean falls within the blue
highlighted area on the graph. Number in the center of the graph represents the
population mean.
Null is the standard mean of the population.
Claim is the projection testing the standard mean.
Significance level: 0.0
M: 6.45
I can say with 90% confidence that the sample mean falls
N:
8
in between:
0.8640112 < µ < 3.395989
x:
2.13
s.d.: 1.89
Results: Fail to Reject the Null Hypothesis
Sample does not provide enough evidence to support the claim
Circle Graph
Gender of Students
Male
50%
Female
50%
Descriptive statistics is the term
given to the analysis of data that
helps describe, show or
summarize data in a meaningful
way such that, for example,
patterns might emerge from the
Christopher Coleman
•The 70% rule -Does not
apply because it is not
in the interest to of
Palm Beach State
College.
• 50% of students were
Male.
•50% of students were
Female.
•This data is descriptive
and is a fact.
•It is qualitative data
and is categorical.
Bar Graph
Christopher Coleman
Students with Financial Aid
• Qualitative Data – data
containing no numbers, this is
typical for bar graphs.
No
7
• It is descriptive data,
because it contains facts.
Yes
21
• 70% rule does not apply.
Chris Coleman
Measures of Central Tendency
The results reflect the conclusion of This data is quantitativ
(contains numbers).
a sample of 28 students found at the
P.B.S.C. library.
The data is descriptive...