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STATISTIK “ Hypothesis Testing ”

STATISTIK “ Hypothesis Testing ”. Chapter 5 Sulidar Fitri, M.Sc Reference: Muohio. Research Question. Does a “college motivational” seminar influence college student’ s attitudes about college? A sample (n = 100) of college students is put through the program:

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STATISTIK “ Hypothesis Testing ”

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  1. STATISTIK“Hypothesis Testing” Chapter 5 Sulidar Fitri, M.Sc Reference: Muohio

  2. Research Question • Does a “college motivational” seminar influence college student’s attitudes about college? • A sample (n = 100) of college students is put through the program: • Did the intervention change attitudes? Survey of Study Habits & Attitudes (0 – 200; less - more favorable)  = 115  = 30 Known population parameters: = 126

  3. Attitudes do seem improved—the mean value from the sample is largerthan the known population average • Remember: SAMPLES VARY! Could this apparent improvement just bedue to chance? • How can we tell?

  4. Hypothesis Testing: • In this case, compare to known 

  5. Setting up the Hypotheses:

  6. QUIZZ

  7. 1. PLEASE CALCULATE The Probability of each “X”

  8. 2. Please fill in the blank columns when  = 19 ,  = 5 ??

  9. 3. From the table below, please calculate the S2 (variance) and S(Standard Deviation) !!

  10. 4. Given a p-value of 0.065, and using the customary α = 5%, the conclusion should be: • Do not reject the null hypothesis • Reject the null hypothesis • Not enough information to determine • Whatever

  11. 5. A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO, p, is less than 5 in every one thousand. • HO: p< 0.005 H1: p>0.005 • HO: p> 0.005 H1: p< 0.005 • HO: p>0.005 H1: p< 0.005 • HO: p < 0.005H1: p > 0.005

  12. Any Queries ?

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