Question

During a countrywide investigation the incidence of T.B was found to be 1%. In a college of 400
students, 5 were affected, whereas in another, 1200 students,10 were affected. Does this
indicate any significant difference?

Answer 1

Step-by-step explanation:

Generally, in practice, either 5% level or 1% level is adopted for the purpose. The factors that affect the level of significance are: (a) the ...

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Answer 2

Answer: 1% is the average people affected by T.B.

Step-by-step explanation:

• It was noticed that T.B affected 1% of people.
• In a college of 400 students 5 were affected.
• % affected=$\frac{5}{400}*100$

                          =1.25%

• In other college of 1200 students 10 were affected.
• % affected=$\frac{10}{1200} *100$

                          =0.83%

• Average % people affected=$\frac{1.25+0.83}{2}$

                                                      =1.04%≈ 1%

• Hence,average people affected is given as 1% who are affected by T.B.

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