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This is the third question
.A factory produces apple juice cointained in a bottle of 1.5 litres.However due to random fluctuation in the automatic bottling machine,the actual vol.per bottle varies according to anormal distribution.It is observed that 10% bottle are under 1.45 litres whereas 5% contain more than 1.55 litres.calculate the mean and s.d of the volume distribution.My ans.
Thanks the second question is this and i got -7 for process A and -7.5 for process B
2.A factory produces a tv sets by process A or by process B.Assuming that the life time distribution of the sets is normal.The sets produced by process A have mean lifetime of 86,000hr with s.d 8,000hr,whereas those produced by process Bhave mean lifetime of 75,000hr with s.d 6,000hr sets with a life time of less than 30,000 hr are regarded as definitely bad.which of the two processes will produce more acceptable sets
how do i go about it then
i used the formula z=x-meu
------
s.d
and this bring me to Z= 5-6
---- =-10
0.1
and since there is no -10 in the table i stopped here.
the question states that
what is the probability that the student stays in classroom for less than 5hr if meu(u) =6hr and s.d =0.1hr
hi bola,
Welcome to the forum!
Your question nearly got lost, because you attached it someone else's post. Suggest you always start a new post.
However did you get -10 for Q1 ?
The question asks for a probability so your answer should be in the range 0 --> 1
Let's get that one sorted and then we can move on to the others.
Bob
thanks very much for this quick respose bob.
1.if the time a student stays in a classroom follows the normal distribution with meu=6hr, s.d=0.1hr,what is the probability that he stays in a classroom for less than 5hours.
Now let get the first question sorted as u suggested.Im not that good in probability.
i used the formula z=x-meu
------
s.d
and this bring me to Z= 5-6
---- =-10
0.1
and since there is no -10 in the table i stopped here.
i have these assignment to submit will want to kmow if my answers are right.
1.if the time a student stays in a classroom follows the normal distribution with meu=6hr, s.d=0.1hr,what is the probability that he stays in a classroom for less than 5hours.
2.A factory produces a tv sets by process A or by process B.Assuming that the life time distribution of the sets is normal.The sets produced by process A have mean lifetime of 86,000hr with s.d 8,000hr,whereas those produced by process Bhave mean lifetime of 75,000hr with s.d 6,000hr sets with a life time of less than 30,000 hr are regarded as definitely bad.which of the two processes will produce more acceptable sets
3.A factory produces apple juice cointained in a bottle of 1.5 litres.However due to random fluctuation in the automatic bottling machine,the actual vol.per bottle varies according to anormal distribution.It is observed that 10% bottle are under 1.45 litres whereas 5% contain more than 1.55litres.calculate the mean and s.d of the volume distribution.My ans.1=-10,2=A=-7,B=-7,5,3.i dinot attempt it Thanks.
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