Mathematics - 30 November 2007

Hey I was wondering if I can find mean to a yes or no survery question.

Like for instance my survey question: Do you love Cold weather?

Out of 30 Students
A. Yes: 17
B. No: 13

Would the median be the most students who love cold wx?

2007-11-30 06:56:59 · 15 answers · asked by geometry1012003 1

Sorry This is really easy I'm just getting a big mind blank

2007-11-30 06:44:14 · 10 answers · asked by Sasha K 1

2007-11-30 06:24:03 · 10 answers · asked by Anonymous

thanks

2007-11-30 06:14:21 · 5 answers · asked by parev 1

2007-11-30 06:08:58 · 5 answers · asked by Anonymous

A huge vat is full of marbles all mixed together, with a number written on it. 20% of the marbles have a "0", 30% have a "1", 10% have a "15", 10% have a "30", 10% have a "80" , and the rest have a"100". Let Y be a number written on a randomly-selected marble (round all answers to four decimal places)

[a]The mean of the random variable Y is:?

[b]The Standard Dev. of Y is:?

[c]Take 20 marbles. What is the probability that the number of "ones" is at most 5:?

[d]Take 100 Marbles. What is the prob. that the number of "ones" is at most 25:?

[e]The prob of the average of numbers on n=25 is less than 35 is:?
For a sample of n=81 it would be:?
For a sample of n=400 it would be:?
For a sample of n=1600 it would be:?
For a sample of n=6400 it would be:?

2007-11-30 06:00:32 · 3 answers · asked by Dani S 524 1

1. sqrt.[5x-6]=2
2. 3+sqrt[x+7]=sqrt[x+4]
3. 3+sqrt[x]=sqrt[x-3]
4. sqrt[x-5]-sqrt[x-3]=4
5. sqrt[x+2]=sqrt[4-x]
6. sqrt[x+2]-sqrt[6x]=-1
7. 2x=sqrt[12x-5]
8. 2+sqrt[x]=sqrt[x+4]

2007-11-30 05:15:32 · 1 answers · asked by brock.young 1

s'' - 36s = 0
Give the solution in terms of the variable t. List the smaller root first
C1 = ?
C2 = ?

2007-11-30 04:59:24 · 4 answers · asked by simonkf2002 1

2007-11-30 04:56:59 · 6 answers · asked by ? 1

A fair coin is tossed 11 times. What is the probability that the coin lands head at least 9 times?

a) 0.0322

b) 0.0654

c) 0.0317

d) 0.0327

e) 0.0269

2007-11-30 04:48:55 · 1 answers · asked by Bella 2

y= what

2007-11-30 04:21:19 · 25 answers · asked by joshua l 1

y= what

2007-11-30 04:19:53 · 10 answers · asked by joshua l 1

A movie theater sells tickets for 8.00 each with Seniors receiving a discount of 3.00. One evening the theater sold 605 tickets and took in 3748 in revenue. How many of each type of tickets were sold?

Can't figure that one out.

2007-11-30 04:11:06 · 10 answers · asked by wrongnumber 1

I created these riddles myself ..so no point Googling for these - big brain power needed here boyz... the first one is a warm up, the second one should prove tougher and the third the toughest yet. (I would post this in the Riddle section, but it seems the minds are over here)

Number 4 is fun for the kiddies - pretty simple

1. What number completes this sequence? Explain? ( 7, 7, 3, 4 )

2. is GOD a BAD IDEA ?

3. If all Plonks are Bewares are all Bewares Heeded? Explain

Fun for the kiddies:
4. What number comes next in the sequence? Explain ( 31, 91, XI, II, 21, III)

2007-11-30 04:09:27 · 3 answers · asked by CubeScience 3

x+1/3-1/2=3x-3/6

i got this answer
x=4/2=2/1=2

is it right?

2007-11-30 04:02:07 · 11 answers · asked by ihurtmyhand 4

The plane is going 180 mph passes over 400 ft directly above an observer. The plane is traveling along a straight path with an angle of elevation of 14 degrees.

2007-11-30 03:44:51 · 2 answers · asked by Anonymous

Evaluate this integral:

∫ (4y dy) / √(2y^2 + 1)

2007-11-30 03:44:21 · 2 answers · asked by NEEDs MATH HELP!! 1

EXACT SCIENCE IS THE SCIENCE THAT PRAYS REENCARNATION

2007-11-30 03:31:33 · 9 answers · asked by Anonymous

Why do most people fear math?

2007-11-30 03:30:33 · 6 answers · asked by Anonymous

suppose that IGI=pq; p and q primes prove that evrey proper subgroup of G is cyclic'

2007-11-30 03:29:17 · 3 answers · asked by Dana S 1

tan X + cot Y / tanX cot Y = tanY + cot X

2007-11-30 03:28:07 · 2 answers · asked by Anonymous

2007-11-30 03:20:40 · 8 answers · asked by mouser 1

CD is a diameter of the circle with center at A and CDHG is a square. What is the area of the irregular polygon CGHD in terms of r?

2007-11-30 03:20:12 · 2 answers · asked by Anonymous

the bases are 2

2007-11-30 03:18:18 · 3 answers · asked by mouser 1

We have been through this problem many times and can't quite get it; any help is appreciated.

Let T be triangle with verts (0,0) (1,0) and (1,2).
Suppose X,Y have joint pdf (5/2)(x^2)*y for x,y in T.

Find E[Y|X], E[Y^2|X] and (we can probably handle) Var[Y|X].

Again, thanks for any help!

2007-11-30 03:16:54 · 2 answers · asked by topher8128 2

IF M<1=5x+7 and M<2=7x+17, then x= ?



ps. < = the angle sign


THANKS!

2007-11-30 03:14:35 · 4 answers · asked by Anonymous

2007-11-30 03:14:19 · 3 answers · asked by Anonymous

2/x-1=3/x

2007-11-30 03:10:51 · 10 answers · asked by lisa g 1

A small local park is shaped like a right triangle. The hypotenuse of the triangle is 10 yards long. One leg of the triangular park is 2 yards shorter than the other leg. Find the length of the other two sides of this park. PLEASE HELP!

2007-11-30 03:01:57 · 7 answers · asked by ejsmith1117 2

if AB=3x-5, BC=x+2, and AC= 13, then x=

2007-11-30 03:01:34 · 8 answers · asked by Anonymous