9709/61: A Level Mathematics Paper 6, Probability & Statistics 2, May/June 2020, Question 1.

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Solution to question 1, A Level Mathematics Paper 6, Probability & Statistics 2, May/June 2020.
  1. Lee-Fah Thong
  2. 9709/61
  3. A Level
  4. Mathematics
  5. Paper 6
  6. Probability & Statistics 2
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Комментарии
Автор

However, if you look in the ms, they used the previous variance which i dont understand why they did that.

Rockerfeller
Автор

Solution for part b is actually wrong. Part b asks confidence interval for "mean" of X. X is actually a "sample" as stated in part a, so we have to use the variance which we found in part a using bessels correction. So X~N(4.96, 0.523) and Xbar~N(4.96, 0.523/7)

MuhammadSanaullah