This discussion is now closed.
Check out other Related discussions
- C1 January 2002?
- Moving from year 10 in england to s5 in scotland
- A level mathematics
- MAT 1996-2006 Solution Thread
- Should i do M1 or S2 or D1 IAL Maths
- Solomon or Elmwood or Delphis Papers?
- History Coursework!!
- AQA Psychology 16 mark answer help
- Glasgow LNAT Score 2024
- Psychology Essay marking help
- 16 mark attachment psychology
- IAL Further Maths
- Can you mark my 16 mark psychology essay
- how to get S1 in STEP
- IAL maths: mechanics or statistics?
- CORMS in IGCSE BIOLOGY ??
- IAL Maths
- Any advices for A-level?
- Student finance long residency
- ocr law
S1 May 2002 question!
A company produces electronic components which have life spans that are normally distributed. Only 1% of the components have a life span less than 3500 hours and 2.5% have a life span greater than 5500 hours.
a) Determine the mean and standard deviation of the life spans of the components.
Please explain step by step.
Thanks
a) Determine the mean and standard deviation of the life spans of the components.
Please explain step by step.
Thanks
Reply 1
Mohit_C
A company produces electronic components which have life spans that are normally distributed. Only 1% of the components have a life span less than 3500 hours and 2.5% have a life span greater than 5500 hours.
a) Determine the mean and standard deviation of the life spans of the components.
Please explain step by step.
Thanks
a) Determine the mean and standard deviation of the life spans of the components.
Please explain step by step.
Thanks
Let X be the life span in 1000's of hours.
X~N(μ,σ2)
so P(X< 3.5) = 0.01
P(Z< (3.5 - μ
/σ = 0.01 (1)P(X>5.5) = 0.02
P(Z>(5.5 - μ
/σ = 1 - P(Z≤(5.5 - μ/σ = 0.02 (2)use ur normal distribution tables to work solve (1) and (2) simultaneously to get μ and σ
Reply 2
Hey has anyone got the mark scheme for S1 may 2002
i could really do with it
Thanks
i could really do with it
Thanks
Related discussions
- C1 January 2002?
- Moving from year 10 in england to s5 in scotland
- A level mathematics
- MAT 1996-2006 Solution Thread
- Should i do M1 or S2 or D1 IAL Maths
- Solomon or Elmwood or Delphis Papers?
- History Coursework!!
- AQA Psychology 16 mark answer help
- Glasgow LNAT Score 2024
- Psychology Essay marking help
- 16 mark attachment psychology
- IAL Further Maths
- Can you mark my 16 mark psychology essay
- how to get S1 in STEP
- IAL maths: mechanics or statistics?
- CORMS in IGCSE BIOLOGY ??
- IAL Maths
- Any advices for A-level?
- Student finance long residency
- ocr law
Latest
Trending
