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#1 Help Me ! » Uniform distribution » 2013-04-22 23:32:04

MathNewbie22
Replies: 1

Suppose you sample 1 value from a uniform distribution with a = 0, b = 20.
What is the probability that the value will be between 13 & 19?

Can someone also please explain this? I'm having a lot of trouble with this probability chapter atm..
Any help would be much appreciated..

#2 Help Me ! » Probability » 2013-04-22 23:27:44

MathNewbie22
Replies: 1

A set of final exam marks in a stats course is normally distributed, with a mean of 73 and a standard deviation of 9.
What is the probability that a student scored below 85 on this exam? Round to 4 decimal places as needed.

I don't understand this question either. Any help would be much appreciated ~~"..

#3 Help Me ! » Calculate Aggregate Price Index » 2013-04-22 23:24:46

MathNewbie22
Replies: 2

Prices & consumption quantities for 3 commodities in 2001 & 2011 are given in the table.
Calculate the unweighted aggregate price index for 2011, using 2001 as the base year (round to 3 decimals as needed).

         Year
     [2001] [2011]
    [P,QQ] [P,QQ]
A [$2 $13] [$4 $15]
B [$32 $7] [$26 $2]
C [$7 $15] [$5 $20]

Can someone please explain?

#4 Help Me ! » Probability » 2013-04-22 23:21:40

MathNewbie22
Replies: 1

A student taking a MC exam with 6 QQ's in which each equation has 4 options, and the student selects the options randomly.
What is the probability that she will get 6 qq's correct? Round to 4 decimal places as needed.
Can someone please explain to me, on how to work this out? I'm quite confused ~~".

0.25% chance in getting one qq right.
0.75% in getting one qq wrong.
X6?

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