How often do you go to Alden

1
How often do you go to Alden?

• Rachel Lewis
• Scott Kilgore
• Joe Licht
• Danielle Korb

2
Research Question

• According to Ohio University Research Statistics
  the average OU student visits the library 15.4
  times per academic year

3
How we collected Data

• Convenience Sampling
• Asked 10 people a piece which 40

4
Survey we used

• How many times per year do you visit Alden
  Library?
• What is your class rank?

5
Hypothesis

• H0 µ lt 15.4
• H1 µ gt 15.4
• a 0.05

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Decision Rule

• Right Tailed test
• Reject H0 if z gt 1.64

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Excel Template Data

• Test of Normal Hypotheses
• One Sample Mean
• Input Data
• HoMean 15.4
• SaMean 63.58
• n 40
• StdDev 43.36
• Alpha 0.05
• Calculated Value
• z 7.03
• Test for Right-Tail
• RtCrt_zVal 1.64

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Decision

• Reject H0
• P almost 0

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Conclusion

• After randomly sampling Ohio University students
  and comparing the mean to the data found by Ohio
  University Research Statistics, it is concluded
  that the average OU student visits the library
  more than 15.4 times per academic year

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Independent Sample T test

• Upperclassmen (1) vs. Underclassmen (2)

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Hypothesis

• H0 µ1 lt µ2
• H1 µ1 gt µ2
• a 0.05

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Decision Rule

• Right Tail Test
• Reject H0 if t gt 1.684

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SPSS Data

• Group Statistics
• RANK N Mean Std. Deviation Std.
  Error Mean
• VISITS 1.00 16 72.0625 52.6390
  13.1597
• 2.00 24 57.9167 36.0228
  7.3531
• Independent Samples Test
• Levenes Test for
  
  t-test for Equality of Means
• Equality of Variances

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Decision

• Fail to Reject H0
• P gt 0.1

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Conclusion

• In comparing a sample of Ohio University
  upperclassmen to underclassmen, it is concluded
  that upperclassmen visits to the library per
  academic year are not greater than that of
  underclassmen

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How we could have made the sample random.

• Use a phone book
• Pick a random name to start with
• Use formula k N/n
• k N/40