Mathematics - 7 June 2007

Im starting to understand this but im stumped on this one.

2007-06-07 14:10:27 · 4 answers · asked by Anonymous

The population contains 5 samples for which only the sample means and standard deviations are known (individual observations are not known):
Sample, Mean, Std Dev
1, 20.5, 2.5
2, 18.2, 2.4
3, 23.4, 3.8
4, 20.8, 3.2
5, 19.6, 1.9

How would I calculate the standard error of the overall mean in order to develop a 95% confidence interval?

2007-06-07 13:59:14 · 3 answers · asked by Anonymous

What the probability of selecting a queen or a king?
What the probability of selecting a diamoung or a ten?
What the probability of selecting a black card or face card?
Please show work

2007-06-07 13:58:53 · 6 answers · asked by Anonymous

2007-06-07 13:58:11 · 9 answers · asked by hypostatize 2

2007-06-07 13:52:50 · 5 answers · asked by Anonymous

I have 'Elementary Algebra' and it shows how to do most of the problems but they are throwing in some problems they don't explain. I am wasting too many points asking question on yahoo every 5 minutes. I have tried webmath.com, but I don't know what many symbols and things are called so I can't look it up. Maybe a book for idiots, cause' obviously, I am a total idiot to forget all the algebra I took in high school and college.

2007-06-07 13:48:38 · 1 answers · asked by herekittykitty 4

Use the square root property to solve the equation (x-5)^2 = 4 can someone please help me?

2007-06-07 13:44:50 · 4 answers · asked by cardoctor61 2

I need to use the square root property to solve the equation x^2 = 25 can anyone help?

2007-06-07 13:43:17 · 4 answers · asked by cardoctor61 2

I need to use factoring to solve the equation 8 z ^2 = 56 z - 48, I think the answer possibly is z= - 6, and z = -1 but I am not too sure can anyone help?

2007-06-07 13:41:40 · 7 answers · asked by cardoctor61 2

i kinda forgot!

2007-06-07 13:37:35 · 4 answers · asked by ^MomentaryInsanity^ 3

if a man has 80 rooms which he can rent out to students at R200 per month. for every R10 increase in the rental the number of rooms rented out decreases by one.

2007-06-07 13:30:31 · 3 answers · asked by Anonymous

The base of the pyramid is an equilateral triangle. Each side of the base is 6.70 cm long.
The slant height of the pyramid is 3.35 cm (half of the base)
I need to find the volume of this pyramid. Please help. Thanks so much.

2007-06-07 13:30:17 · 3 answers · asked by Nhi D 1

2007-06-07 13:26:12 · 4 answers · asked by Anonymous

2007-06-07 13:16:46 · 12 answers · asked by Anonymous

2007-06-07 13:16:09 · 5 answers · asked by Anonymous

I need to use factoring to solve the equation 9x^2 + 27 x = 0 I think the answer is x = 3, and x = -3 but I am not sure can you please help?

2007-06-07 13:15:04 · 4 answers · asked by ambi565 2

Would appreciate it.

2007-06-07 13:14:00 · 5 answers · asked by Rebubula 2

A certain positive integer has the interesting property that to multiply it by 7, all that is needed is to take the 7 from its right end and place it at the beginning (far left). What is the number?

I know that the last digit is 7 and the digit before 7 is 9

2007-06-07 13:12:58 · 4 answers · asked by Anonymous

whats the easiest way to do this without a calculator? lets say 18% of $67

2007-06-07 13:10:22 · 10 answers · asked by Jinx 1

2007-06-07 13:09:35 · 13 answers · asked by superstar 1

5/4
51/40
511/400
5111/4000
51111/40000

It's a pretty simple sequence, but I'm not even sure how else to express it without listing its terms. Does it approach a value, or increase without bound?

2007-06-07 13:08:09 · 3 answers · asked by Mehoo 3

What is the domain and Range of this equation:

y= (4x) / (x^2 + x - 12)

Also, how do you find this out?

2007-06-07 13:03:38 · 3 answers · asked by L Thorton 2

I need to write the equation x(x - 6) + 8 = 0 in quadratic form and then solve it by factoring, I think the correct answer is 4 and 2ut I am not sure can you help me?

2007-06-07 12:59:31 · 8 answers · asked by ambi565 2

?????????Can anyone give me 3 perfect squares between 100 and 200????????????????????????

2007-06-07 12:58:00 · 7 answers · asked by Pwnnubs 2

Would this be a postive number or a negative?

2007-06-07 12:46:17 · 7 answers · asked by HS Kid 1

A three-digit number is converted to a six-digit number by writing the digits again next to it.
For example, the number 235 is converted to 235235.
Why is it that the new number can always be divided by 7?

2007-06-07 12:40:57 · 10 answers · asked by mdm10 1

Ok the deal is one-half times the fourth root of 32

1/2*[32^(1/4)]

Now I know the answer is the fourth root of two, but I have nooooo idea why....can anyone explain this to me?

2007-06-07 12:39:38 · 13 answers · asked by Burnt Toast 1

i can throw a 14 lb. shot put about 32 ft. i was wondering what that distance would become, or compare to a 12 lb shot put throw. i was just wondering if someone had a math of physics equation i could use. thank you.

2007-06-07 12:39:18 · 4 answers · asked by Anonymous

2007-06-07 12:37:18 · 15 answers · asked by superstar 1

In a certain mill the cost C is thousands of dolllars of producing x tons of steel is given by c=0.3x+3.5. The revenue R in thousands of dollars from selling x tons is given by r=0.5x
Find the point at which r=c (the break even point)

2007-06-07 12:35:43 · 7 answers · asked by Amy M 5