STATISTIC PROJECTJenny Lee & Han Woong Kim

Table of Contents

• How to do random sampling

• Visual map of random sampling

• Random assignment & Random sampling

• Potential bias

• Experimental or observational study?• Treatment

• Single blind or Double-blind?

• Result

• Conclusion

How we did Random sampling

1. We separated male students and female students

2. We numbered all of the students in each group

3. Used random number generator

4. For male students, we picked 8 students out of 20 students

5. For female students, we picked 6 students out of 15 students

6. 20:15 = 8:6

Visual map of random sampling

SPPS Students

8 male students

3 times shooting with closed eyes

3 times shooting with opened eyes

6 female students

3 times shooting with closed eyes

3 times shooting with opened eyes

Combine results

Combine results

Compare results

Random Assignment & Random sampling

Population Cause & effect

Random assignment (o)Random sampling (o)

Population(o) Cause & effect(o)

Random assignment (x)Random sampling (o

Population(o) Cause & effect(x)

Random assignment (o)Random sampling (x)

Population(x) Cause & effect(x)

Random assignment (x)Random sampling (x)

Population(x) Cause & effect(x)

Since our subjects all receive same treatments, we cannot apply random assignment.However, we could apply random sampling to our experiment as shown in previous slideTherefore, our experiment can be used among population, but do not has cause & effect

Potential bias

• We could not control the subjects’ sleeping time, nutrients

• Subjects did not have same physical strength

• Subjects did not have equal eyesight level

Experimental or Observational study?

EXPERIMENTAL STUDY!!!!

Treatment

• Instructed subjects to close or open their eyes during basketball shooting

Single-blind or Double-blind

• Single blind

• Why not Double blind?

Conclusion