52 Statistical analysis
1. Motive and aim
We hope to understand the promotion effectiveness in the school through questionnaire survey. Therefore, Cyberfair project team members make use of spare time to brainstorm the following items and understand students’ understanding of this thematic research in the school through online survey.
2. Discussion process
We were quite excited to receive the questionnaires and we were looking forward to students’ answers. We discussed 45 items respectively in groups of 4 students. Some students laughed and some of them shook their heads when they examined the answers, and they were thinking about why students had so ridiculous answers. Thus, we began to think whether our items had been set correctly, whether the item meanings were ambiguous to cause students’ wrong answers or whether we were hasty to make a presentation on the stage and the barrier passing time was too short, so they didn’t absorb relevant knowledge. We ever doubted whether our research ability is insufficient and students’ cognition is different. During the process, we had many doubts and the tutors gave us their opinions, so we gradually clarified the analysis results through constant discussion. Knowing everyone’s ideas by means of questionnaire survey can make us understand the areas needed to be improved in this promotion campaign. It is hoped that we can do it better next time through these hardships.
3. Analysis for statistical results
We designed the items through online questionnaire at Google DOC and then requested computer teachers to spend 10 minutes in helping us do the questionnaire survey in the class. There are totally 639 students in Grade 5 and Grade 6 participating in this questionnaire. Our statistical results are shown as below:
Grade: In this survey, there are totally 416 students in Grade 5 and 223 students in Grade 6 participating in online questionnaire survey. We choose students in Grade 5 and Grade 6 instead of those from Grade 1 to Grade 4 because we think that students in higher grades have better understanding ability and master more knowledge about nature science. Therefore, students in lower grades are not incorporated into the analysis objects. 
Sex: In this survey, there are 609 male students and 302 female students. The census method is applied to do the online questionnaire survey, so there is smaller difference in male and female ratio. Roughly, males account for 52.7% and females account for 47.3% of the total students, and small gap exists in male and female ratio. 
Q1:Will the electromagnetic wave produced by household electrical appliances damage cellular elements? Result: 451 students say Yes while 188 students say No.
Analysis: According to the data, most students in Grade 5 and Grade 6 think that the electromagnetic wave produced by household electrical appliances will damage cellular elements while only 30% students think that the electromagnetic wave produced by household electrical appliances will not damage cells. It may be caused by the news that media universally report the effect of electromagnetic wave on human body. Students know the microwave oven, induction cooker and other electrical appliances will emit electromagnetic wave, but they have no deeper understanding of electromagnetic wave and are strange to electromagnetic wave. In fact, the electromagnetic wave of electrical appliances is nonionizing radiation. As indicated by the research of WHO, it cannot prove that electromagnetic wave is the cancerigenic factor for lack of evidence. Therefore, government should actively advocate the populace to further understand electromagnetic wave! 
Q2:May the electromagnetic wave affect human health? Result: 448 students say Yes, 27 students say No, and 164 students give an uncertain answers.
Analysis: WHO has done many researches and the final conclusion is “the electromagnetic wave may or may not affect human health”. The questionnaire results show that most students generally believe that electromagnetic wave will affect human health, which may be affected by network or media reporting. Meanwhile, the government has not actively promoted the knowledge and information in the aspect of electromagnetic wave, so people may have the wrong concepts. 
Q3:Which answer listed below is wrong? Result: 415 students choose “taking more exercise”, 88 students choose “keeping the distance”, 66 students choose “reducing the hours of use” and 70 students choose “pulling out the plug when it is not used”.

Q4:Will people living near the electromagnetic wave of base station be affected by electromagnetic wave? Result: 581 students say Yes and 58 students say No.

Q5:Will the electromagnetic wave of base station cause environmental pollution? Result: 403 students say Yes and 236 students say No.
Analysis: the correct answer to this item is that the electromagnetic wave of base station “will not” cause environmental pollution. According to the data, more than 60% students think that electromagnetic wave of base station will cause environmental pollution, or they think that electromagnetic wave is the same with radiation or nuclear energy to cause the pollution to our surrounding environment. 
Q6:Which part of the hair dryer has the highest electromagnetic wave value? Result: 106 students choose “the air outlet of hair drier”, 153 students choose “electric wire” and 380 students choose “motor winding”.

Q7:On average, which family electrical appliances has the highest value of electromagnetic waves? Result: 244 students choose hair drier, 173 students choose refrigerator and 222 students choose television.
Analysis: the correct answer is “hair drier”because hair drier has more coils than other household electrical appliances. Although most students choose that electromagnetic wave value emitted by hair drier is the highest among all the household electrical appliances, 60% students give the wrong answer. Therefore, our team needs to pay more efforts in this part during the advocacy. 
Q8:Which item is the most likely to cause cancer? Result: 184 students choose French fries, 433 students choose electromagnetic wave of electrical tower, and 22 students choose coffee.

Q9:How do you feel if there are high voltage towers or transformer stations near your home? Analysis: we have made the comprehensive integration for the various opinions expressed by students and classified students’feelings into several categories:
Scare and worry:
Anger and dislike:
No feeling:
4. Afterthoughts After reading the questionnaires filled by students, we think that students’ concepts and knowledge for electromagnetic wave are seriously insufficient. Almost all their relevant information comes from media news or they may “hear of” and “speculate” the relevant information and network rumor. We hope that there will be more teaching websites, interactive media, television programs, teaching materials or “electromagnetic wave education center” where everyone can have a better understanding of electromagnetic wave and face the ubiquitous electromagnetic wave rationally and wisely. 