Sunday

February 7, 2016
Total # Posts: 496

**Statistics**

hi i need help calculating the standard error using the central limit theorem. *a population of scores contains exactly 5 scores : 2, 3, 6, 8, 11, there are 5x5=25 samples of the two scores (n=2)* i already calculated the standard deviation and mean. for the question my ...
*November 21, 2010*

**math**

hi i need help calculating the standard error using the central limit theorem. *a population of scores contains exactly 5 scores : 2, 3, 6, 8, 11, there are 5x5=25 samples of the two scores (n=2)* i already calculated the standard deviation and mean. for the question my ...
*November 21, 2010*

**statistics**

hi, how would i calculate the standard deviation of the following sampling distribution of means. apparently this is the longhanded way of calculating standard error. *a population of scores contains exactly 5 scores : 2, 3, 6, 8, 11 (2, 2) ... 2 (2, 3) ... 2.5 (2, 6) ... 4 (...
*November 21, 2010*

**statistics**

what is meant by the standard error of a statistic? what is it an index of? what is meant by the standard error of the mean? what it is an index of?
*November 21, 2010*

**statistics**

what is sampling distribution and sampling distribution of means?
*November 21, 2010*

**statistics**

what is random sampling and why is it important to statistical inference with reference to representativeness and error?
*November 21, 2010*

**Math**

i have a question regarding statistics. i just don't know how to do it and would really appreciate if someone could tell how i can solve it. the question is; a) compute the mean and the standard deviation of the population? ive looked through all my notes and my textbook ...
*November 21, 2010*

**statistics**

i have a question regarding statistics. i just don't know how to do it and would really appreciate if someone could tell how i can solve it. the question is; a population of scores contains exactly 5 scores : 2, 3, 6, 8, 11 a) there are 5x5=25 different samples of two ...
*November 20, 2010*

**Chemistry**

If the pH of grapefruit is 3 and the pH of beer is 5, how many times more acidic is the grapefruit juice than the beer? According to the logarithmic scale
*November 10, 2010*

**Chemistry 110**

What anhydrous salt has a molecular mass of 258g/mol? I believe the results from my experiment were incorrect and i can not figure out the general formula for the hydrated salt with a molecular mass of 258g/mol. please help
*November 9, 2010*

**Chemistry**

What anhydrous salt has a molecular mass of 258g/mol? I believe the results from my experiment were incorrect and i can not figure out the general formula for the hydrated salt with a molecular mass of 258g/mol. please help
*November 9, 2010*

**accounting**

The gross pay is $3000 don't know the net pay
*November 9, 2010*

**math**

You would dothe commission divided by the percentage of the commission, so 6.48/.054
*November 8, 2010*

**accounting**

Earnings at regular rate (40hrs x $40) = $1600 Earnings at overtime rate 20hrs x $40 x 1.75 = 1400 1400+1600 = 3000
*November 5, 2010*

**chemistry**

A student performing the water of hydration experiment cant seem to get his hydrate to constant weight. Several times he heats the compound, allows it t cool, and weighs it. But each time he does, he obtains a different mass. can you suggest some possible causes for this dilemma?
*November 3, 2010*

**Chemistry**

A commercial for a well known cleaning powder says that it "shakes out white, then turns blue" what type of reaction os occuring? what compound can one use to produce this effect?
*November 3, 2010*

**Chemistry**

How is water of hydration related to measurement and how it is related to the law of definite composition?
*November 3, 2010*

**Chemistry**

calculate the empirical formula. A chemist heats 50.00g of sulfur under controlled conditions to produce a sulfer-oxygen compund.The mass of the sulfur-oxygen compound is 100.00g. What is the empirical formula of the sulfur-oxygen?
*October 20, 2010*

**Chemistry**

If you use a different mass of magensium metal in an experiment would the empirical formula of the compund be the same?
*October 20, 2010*

**college**

Defendant A was suspected of selling stolen property from his dorm room. An undercover campus police officer knocked on Defendant A’s door. And when answer, asked for an affordable radar detector. In response, defendant A said that he just got two new ones last night. ...
*October 11, 2010*

**crim j**

Should this evidence be excluded? What court case(s) justify your decision?
*October 11, 2010*

**crim j**

Defendant A was suspected of selling stolen property from his dorm room. An undercover campus police officer knocked on Defendant A’s door. And when answer, asked for an affordable radar detector. In response, defendant A said that he just got two new ones last night. ...
*October 11, 2010*

**Physics**

No..so is it 363+699+363 / 240s + 660s ?
*October 5, 2010*

**Phyiscs**

A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 22 minutes at an average speed of 6.80 m/s. During the second part, she rides for 36 minutes at an average speed of 5.20 m...
*October 5, 2010*

**physics**

State the law of acceleration in its full form and give examples of how it works
*September 29, 2010*

**college**

During a particular thunderstorm, the electric potential difference between a cloud and the ground is Vcloud - Vground = 1.3 × 108 V, with the cloud being at the higher potential. What is the change in an electron's electric potential energy when the electron moves ...
*August 27, 2010*

**physic**

Calculate the true mass (in vacuum) of a piece of aluminum whose apparent mass is 4.5000 kg when weighed in air.
*August 8, 2010*

**math**

please help solve this- i cant do it either
*August 7, 2010*

**math fractions**

whats 1/8 of $84.00
*July 16, 2010*

**child care**

b) because im in middle school now so im kinda of an expert
*July 16, 2010*

**Economics**

Hsjaj7272
*July 13, 2010*

**Geometry**

B is the midpoint of Symbol for segment A C. . AB=5x+2 AC=12x-2 What is the value of BC? Show your work for credit. Line segment A C with point B on it.
*July 1, 2010*

**math**

As a restaurant owner there are many decisions that you need to make on a daily basis, such as where to keep inventory levels. You wish to replenish your stock of dishes by purchasing 250 sets for your restaurant. You have two dish design from which to choose. One design costs...
*June 21, 2010*

**chem**

Is the following true or false? The actual size of a measurement multiplied by a conversion factor remains the same, because the measurement being converted is multiplied by 1.
*June 11, 2010*

**algebra1**

what formula should i use to solve this quadratic formula? 2x2 + 4x + 2 = 0.
*June 7, 2010*

**statistics**

I need help for this question asap thanx
*May 3, 2010*

**statistics**

Distance travelled in a week by sales staff employed by nationwide security firm is approximately normally distributed with a mean of 200 miles and standard deviation of 48 miles. Estimate the percentage of staff who in a week travel: 1. a)less than 80 miles b)more than 250 ...
*May 3, 2010*

**Chemistry**

i really dont know why it would be important
*March 31, 2010*

**Chemistry**

Why is it important for you to know how to separate solids from liquids?
*March 31, 2010*

**calculus**

for x is an element of [-11,11]the function defined by f(x)=x^7(x+3)^6. where does the function achieve its minimum?
*March 29, 2010*

**chemistry**

predict the pH of the solution obtained when a 1.0 M magnesium hydroxide solution is titrated with an equal amount of a 1.0 M solution of sodium chloride.
*March 29, 2010*

**Spanish**

Mi hermano quieren jugar al futbol.
*March 29, 2010*

**Chemistry**

What are some periodic trends among the following elements- carbon, silicon,germanium,tin, and lead?
*March 23, 2010*

**Chemistry**

yes but how is it compared
*March 23, 2010*

**Chemistry**

When you look up the atomic masses of Si and Sn and then find the average and then look up the atomic mass of Ge, what is discovered? does it lend supporting evidence to the periodicity of elements?
*March 23, 2010*

**Chemistry**

I need help describing some periodic trends in the periodic table
*March 23, 2010*

**Chemistry**

why do elements within a group have similar chemical properties?
*March 23, 2010*

**Chemistry**

What does the study of the periodic table have to do with classification and prediction?
*March 23, 2010*

**law of definite composition**

when performing an experiment using potassium chlorate and heating it to form potassium chloride what reasons can you offer for any differences between your results and another lab group in your class?
*March 10, 2010*

**chemistry**

why is the law of definite composition important?
*March 10, 2010*

**chemistry**

how could you determine whether all the potassium chlorate had been decomposed after heating it using the law of definite composition?
*March 10, 2010*

**Physics**

A bat flying in a cave sends out a sound wave to navigate. If the cave temperature is 10.8 C, and the sound the bats sends out takes 0.0679 s to echo back, how far away is the cave wall
*February 28, 2010*

**Physics**

If you are standing on the edge of a canyon and yell into the canyon, how long will it take the echo to return to you if the opposite canyon wall is 1060.4 m away and the air temperature is 25.2 C?
*February 28, 2010*

**Physics**

What is the fundamental frequency for tube resonating in water if the speed of sound was 343.5 and the tube was 0.274 m out of the water.
*February 28, 2010*

**Chemistry**

calculate the number of atoms in 31.5g of cadmium
*February 18, 2010*

**US Government**

Thank you Ms. Sue. Goodnight
*February 17, 2010*

**US Government**

Why was the separation of powers among the branches important to the founding fathers? Thanks so much! Ash
*February 17, 2010*

**US Federal Government**

thank you very much!
*February 17, 2010*

**US Federal Government**

How is popular sovereignty present in US Federal government? I know popular sovereignty means the people have the primary source of governmental authority (it also had to do with slaves states and how a state registered their vote as a slave state or not a slave state... HELP...
*February 17, 2010*

**US HISTORY**

which of the 3 branches of the federal US government does the federal reserve and the census bureau fall under?????? please answer! thanx! love, ash
*February 7, 2010*

**US HISTORY**

which of the 3 branches of the federal US government does the federal reserve and the census bureau fall under?????? please answer! thanx! love, ash
*February 7, 2010*

**US HISTORY**

I am trying to understand the following 3 concepts: Popular Sovereignty Separation of powers (and the 3 branches of gov) Checks and balances (how does a branch have power over another) Thank you for your insight! Ash
*February 3, 2010*

**US Government**

I am having a problem understanding what the different roles of the US President are responsibilities: What are"the Head of States" responsibilities? What are "The Chief Executive" responsibilities? What are the "Chief Diplomat" responsibilities? ...
*January 31, 2010*

**MATH**

WHAT IS THE SEQUENCE OF 5,7,9,11,13,15...
*January 27, 2010*

**Poetry/English**

I am STILL trying to find 3 poetic devices in the poem "The Road Not Taken" by Robert Frost: Please advise if I am on the "right road" or could you put me on "the right path if I am wrong... line 12 "In leaves no step had trodden black"--is ...
*January 26, 2010*

**english**

I am trying to find 3 poetic devices in the poem "The Road Not Taken" by Robert Frost. I think "to Where it bent in the undergrowth" is personification I think "Somewhere ages and ages hence" is figurative language and "then took the other, ...
*January 25, 2010*

**instrument**

I have absolutely no idea about this, but I am doing a crossword puzzle for music, and I don't know what #1 across is. The clue it gives you is, "music sounds produced by the use of tools," and the word or words is 19 letters long. Help please! Due tomorrow!
*January 24, 2010*

**physics**

A train with a velocity of 45.1 m/s must come to an emergency stop in 10.6 s. How far did it travel during this time? i tried to use the x=1/2at^2+vit+xi equation but that did not work..
*December 17, 2009*

**physics**

A tailback initially running at a velocity of 6.6 m/s becomes very tired and slows down at a uniform rate of 0.55 m/s2. How fast will he be running after going an additional 6.2 meters?
*December 17, 2009*

**physics**

A tailback initially running at a velocity of 6.7 m/s becomes very tired and slows down at a uniform rate of 0.68 m/s2. How fast will he be running after going an additional 6.1 meters?
*December 17, 2009*

**physics**

Over a period of 9.0 seconds a plane changes its velocity from 29.5 m/s to 45.7 m/s. What is its uniform acceleration? ---------------- I'm reviewing for my final and i can not think of what the formula to solve this is.
*December 17, 2009*

**English**

how do you write great descriptive paragraph
*December 7, 2009*

**antonyms**

whats ftthn???
*November 18, 2009*

**physics**

A 3.60 kg ball is dropped from the roof of a building 184.8 m high. While the ball is falling to earth, a horizontal wind exerts a constant force of 12.1 N on the ball. How long does it take to hit the ground? (acceleration of gravity = 9.81 m/s^2)
*November 6, 2009*

**calculus**

Gravel is being dumped from a conveyor belt at a rate of 10 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal to each other. How fast is the height of the pile increasing when the pile is 20 feet high?
*October 29, 2009*

**calculus**

Air is being pumped into a spherical balloon so that its volume increases at a rate of 80cm^3/s. How fast is the surface area of the balloon increasing when its radius is 7cm?
*October 29, 2009*

**chemistry**

26 protons and 24 electrons. write the symbol of ions
*October 29, 2009*

**calculus**

When air expands adiabatically (without gaining or losing heat), its pressure and volume are related by the equation PV^1,4=C where C is a constant. Suppose that a a certain instant the volume is 520 cubic centimeters and the pressure is 99kPa and is decreasing at a rate of ...
*October 29, 2009*

**calculus**

At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 17 knots and ship B is sailing north at 23 knots. How fast (in knots) is the distance between the ships changing at 3 PM?
*October 29, 2009*

**math**

fill in the missing signs to make the sum correct...........8 ? 4 ? 4=9
*October 18, 2009*

**PRE-CALC**

Ummm the answer in the teacher's book says 11 ft by 14 ft. No idea where you guys got 54.5 and 51...
*October 16, 2009*

**government**

the difference among members of the constitutional convention were settled by a duels b compromises c boycotts d all of the above
*October 4, 2009*

**science**

I was wondering where i could find some information or articles about people with opinions about : whether there should be a national curriculum in the united states. I have tried googling the topic but i couldnt find much info there. Anything at this point would help. THANK YOU!
*September 30, 2009*

**Science**

gotcha! thanks very much!
*September 23, 2009*

**Science**

another conversion question: 876.045 mm = _______________m thanks so much!
*September 23, 2009*

**Science**

please help with this conversion: 17cm(cubed)=____ml
*September 23, 2009*

**home economics**

resaerch pictures in books and magasines showing other methods of disposal of fullness
*September 12, 2009*

**PRE CALCULUS**

V = x(16-2x)(19-2x) = 175 ft³ Ok, thanks. Now I'm trying to multiply out and having some difficulty. I am getting 4x^3-70x^2+304x = 175 which I'm not sure how to work with
*September 6, 2009*

**Pre Calculus**

square root of 3x-4 = (x-4)^2-3 Normally, I either take the square root of both sides or I square both sides. Since there is a sqared and a square root, I am confused on how to go about it. Could you please head me in the right direction?
*September 6, 2009*

**MATH Prob.**

in a writting competition, the first place winner receives 1/2 of the prize money.the second runner up receives 1/4 of what the winner won .what was the total amount of prize money distributed if the winner receives $6000.
*August 20, 2009*

**Business**

I have a multiple choice question I don't know how to do, please help. I was thinking d). Structural resources of a frim include a) customer relationships b) databases c) organizational procedures d) All of the above e) None of the above
*July 8, 2009*

**Legal**

yes, i am looking for a definition for both.
*June 14, 2009*

**Legal**

What is the difference between infringing use and non-infringing use?
*June 14, 2009*

**math**

retarted adding two cylinders together
*April 21, 2009*

**Economics**

bcdbaabcddcbba
*April 14, 2009*

**Stats help!**

Does anyone know how to find the variance or something if only the correlation of something is given and the other way around?? I really need help with this! THANK YOU!
*April 6, 2009*

**stats ?**

There are 5 situations below. Can someone please match the situations up with the threat. These would be in a quasi-experimental design. The threats are history, maturation, mortality, testing, and instrumentation threat. THANK YOU! A.Kindergarten students who were identified ...
*April 6, 2009*

**stats ?**

There are 5 situations below. Can someone please match the situations up with the threat. These would be in a quasi-experimental design. The threats are history, maturation, mortality, testing, and instrumentation threat. THANK YOU! A.Kindergarten students who were identified ...
*April 5, 2009*

**STATS ?**

There are 5 situations below. Can someone please match the situations up with the threat. These would be in a quasi-experimental design. The threats are history, maturation, mortality, testing, and instrumentation threat. THANK YOU! A.Kindergarten students who were identified ...
*April 5, 2009*