random sample of 1000 students. Respondents were classified by gender (male or female) and asked if she/he smoked. Results are shown in the contingency table below:   smoke Not smoke Total Male 200 200 400 Female 250 350 600 Total 450 550 1000   Is there any relationship between the gender type and smoking? Use a 0.05 level of significance. Note: calculate the expected value, then calculate the chi-square.

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