Anonymous
Anonymous asked in 社會與文化語言 · 1 decade ago

logistics curve

6. Ten years ago, at time t-=0, only one percent of households had broadband internet service. Today half the households have broadband. Show how to use logistics curve to predict when the participation rate will reach 90%?

Ans: t=14.67

Update:

我需要計算 謝謝大家囉

2 Answers

Rating
  • 1 decade ago
    Favorite Answer

    Logistics curve: P(t)= 1 / (1+n*e^(-t/u))

    at t=0, P(t)=0.01 ==> n = 99 ,

    at t=10, P(t)=0.5 ==> u = 2.17622 ,

    find t , where P(t)=0.9 ==> t= 14.78

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  • 1 decade ago

    是要翻譯還是要算?

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