Friday

April 29, 2016
Number of results: 44,172

**Maths**

Hey :) I'm sitting my maths non-calculator GCSE tomorrow and am currently revising. I'm doing a practise paper and am currently stuck on this question: Express A in terms of w. 3w + 20 A -------- = -------- 200 A + 12 -- What does the question mean? -- Can you explain to me ...
*May 17, 2009 by Sarah*

**maths a**

Charlotte received a score of 68 on both her English and Maths tests. The mean for English was 52 and the mean for Maths was 55. The standard deviations for English and Maths were 10 and 8 respectively. In which subject did Charlotte perform better? Explain your decision. ...
*September 11, 2014 by jay*

**Maths B**

Charlotte received a score of 68 on both her English and Maths tests. The mean for English was 52 and the mean for Maths was 55. The standard deviations for English and Maths were 10 and 8 respectively. In which subject did Charlotte perform better? Explain your decision.
*May 24, 2012 by Anna*

**Maths B**

Charlotte received a score of 68 on both her English and Maths tests. The mean for English was 52 and the mean for Maths was 55. The standard deviations for English and Maths were 10 and 8 respectively. In which subject did Charlotte perform better? Explain your decision.
*May 24, 2012 by Anna*

**Maths**

How to find Geometric mean if arithmetic and harmonic mean is given, The question is AM = 2700 and HM = 75, then find GM ?
*June 15, 2013 by Steve*

**maths**

Please help with this question.The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg.The mean is 1.0042kg.Standard deviation is 0.042kg Choose the option that is closest to the probability, to three decimal places, that the mean weight of ...
*June 5, 2011 by Rebecca*

**Maths B**

Andrew got 68 for both English and Maths. The mean for english was 52 and the mean for Maths was 55. The standard deviations were 10 and 8 respectively. Determine the subject in which andrew did better
*March 9, 2013 by Will*

**maths**

what does this question mean? "insert a one fraction in between" q 1-1/2 and 4/5
*July 26, 2008 by maanasa*

**maths**

what does this question mean? "insert a one fraction in between" q 1-1/2 and 4/5
*July 26, 2008 by maanasa*

**Maths**

Statistics The marks scored by a sample of 56 students are summarised by: N=56 Sum of x =3026 sum of(x-the mean)^2 =15378 A) calculate the mean and the standard deviation Mean I got - 54.04 (2.dp) Standard deviation I got - 16.72 (2.dp) Is this correct? B) the formula y=1.2x-...
*November 15, 2015 by Anonymous *

**Maths **

Statistics The marks scored by a sample of 56 students are summarised by: N=56 Sum of x =3026 sum of(x-the mean)^2 =15378 A) calculate the mean and the standard deviation Mean I got - 54.04 (2.dp) Standard deviation I got - 16.72 (2.dp) Is this correct? B) the formula y=1.2x-...
*November 15, 2015 by Anonymous *

**statistics**

basically i'm at the begining of the text book doing summer work it's talking about mean and stuff asked to find the mean of a set of data and given 14 different numbers the question then goes on and tells me a fifteenth number is added to the set of data with the value of ...
*July 15, 2009 by statistics*

**maths**

find 2 numbers whose arithmetic mean exceeds their geometric mean by 2 .and whose harmonic mean is 1/5 of the larger number.....
*December 1, 2015 by xxxx*

**Maths - Reciprocals**

I'm having some troubles. I can't think of an example to this question. Give an exmaple of a quadratic whose reciprocal has no vertical asymptotes I think it's 1/x^2. The question says vertical asymptotes so I'm assuming they mean there will only be one. But I don't think I'm ...
*August 24, 2008 by TP*

**English**

Question: Does 'What's up?" mean "How are you"? or "Hello, what are you doin g"? •English - Ms. Sue, Thursday, April 11, 2013 at 5:38pm Yes. It's an informal way of greeting someone. It's mostly used by young people. ================== Thank you for your help. Question: Does '...
*April 11, 2013 by rfvv*

**stat**

ok there was a question that my teacher told me i got wrong the question asked me to compute the mean which I did... then the question went on to tell me compute the mean with another observation equal to zero then the part that he drew the line through was my response to this...
*September 6, 2009 by stat*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...
*May 9, 2011 by albert*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...
*May 10, 2011 by albert*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...
*May 11, 2011 by albert*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...
*May 11, 2011 by albert*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...
*May 13, 2011 by albert*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...
*May 14, 2011 by albert*

**maths**

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options ...
*May 14, 2011 by albert*

**maths**

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options ...
*May 15, 2011 by albert*

**maths**

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options ...
*May 16, 2011 by albert*

**maths**

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options ...
*May 17, 2011 by albert*

**maths**

The mean weight (1.0042kg) of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options...
*June 11, 2011 by ben*

**maths**

The mean weight (1.0042kg) of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options...
*June 12, 2011 by ben*

**maths**

The mean weight (1.0042kg) of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options...
*June 13, 2011 by ben*

**maths**

The mean of 10 observations is 21. If each score is divided by 3, find the new mean.
*March 17, 2010 by neha*

**maths**

The distribution of the time taken to run 1000 metres by users of a treadmill in a sports centre has mean 7.2 minutes and standard deviation 2.045 minutes. 1 Choose the option that is closest to the probability that the mean time taken to run 1000 metres for a sample of 30 ...
*May 8, 2011 by olek*

**maths**

The distribution of the time taken to run 1000 metres by users of a treadmill in a sports centre has mean 7.2 minutes and standard deviation 2.045 minutes. 1 Choose the option that is closest to the probability that the mean time taken to run 1000 metres for a sample of 30 ...
*May 8, 2011 by olek*

**Maths Question**

the slope of a curve y=f(x) is given by dy/dx= (x-1)(x-2)^2(x-3)^3(x-4)^4(x-5)^5 for what value or values of x does y have a local maximum/miniumum? justify your answer. i tried solving this question but couldn't figure out how to do it. i even asked my old maths school ...
*October 23, 2014 by Khyati*

**Maths**

Mean of n numbers X1, X2,--------Xn is m. If Xn is replaced by x the new mean is
*July 26, 2011 by Sharon*

**spanish**

what does the question and answers mean? "¿Cómo iba Ud. a la escuela primaria?" "Generalmente _____." a. caminaba b. lloraba c. me portaba mal d. molestaba a--walk? b--cry? c--behave bad? d--annoy/bother? what does the QUESTION mean?
*May 6, 2009 by y912f*

**maths**

How to calculate the mean number of threatened fishes, where total number of fishes is 29300 and number of threatened fishes is 1173. Hmmmm. you have one data point, that is, 1173 fish are threatened. The mean of one number is that number. Is there something else here? Thats ...
*May 20, 2007 by Ellie*

**What does the question in my post mean?**

What does the following question mean? -- How can you live within a democracy that expects you to participate, to hold an opinion and vote and thereby control and be responsible for your society—but at the same time, you must surrender and follow the will of others if even the...
*November 15, 2007 by Anonymous*

**Statistics**

I have provided information from #3-5 in order to answer #6.. 3. Give the mean for the mean column of the Worksheet. Is this estimate centered about the parameter of interest (the parameter of interest is the answer for the mean in question 2)? The Mean for Column “mean” is 3....
*October 7, 2011 by Hope *

**maths**

the mean of the scores of student during the first 5 months is 23.8 ( what is the score of the 6 month if the mean of his scores is 24 marks?
*January 3, 2011 by Anonymous*

**Statistics**

This is the remaining part of Jackie's question:randomly selected adults. Show the formula that you will use and then calculate the mean age. Answer: Formula: mean = Mean:
*October 22, 2009 by Jackie*

**maths**

10 scores have a mean of 85.4, but one was enetered at 75 when it should have been 57 what is the new mean?
*October 17, 2015 by diane*

**Statisitcs**

I have given you the information from 2-4 in hopes to help with the answer for #6.. Thank you! 2. Calculate the mean and standard deviation of the probability distribution created by rolling a die. Either show work or explain how your answer was calculated. x 1 2 3 4 5 6 sum p...
*October 6, 2011 by Hope *

**maths**

The heights in centimetres of men in a sample selected at random may be modelled by a normal distribution with mean 180.5 and standard deviation 11.3. 1 Choose the option that is closest to the value above which 30% of the heights of men will lie. Options for Question1 A 174....
*May 8, 2011 by olek*

**maths **

The lifetime in hours of a certain make of batteries follows a normal distribution with mean 160 and standard deviation 30. Calculate the interval, symmetrical about the mean within which 75% of the battery lifetimes lie.
*February 13, 2013 by harish*

**spanish**

what does "contesta estas preguntas sobre ti, tu familia, y tus amigos" mean. does it mean answer the questions about yourself, your family, and your friends? does that mean i have to have 3 sentances for each question.
*September 14, 2010 by j*

**math**

I have a question on a quiz, and I cant seem to figure it out I have to add 50,56,52,46,48,42,38 and that got me 332 then I have to divide it by 7 and get the mean, but then I get a remainder of 3 and I don't know what to do because I have to find that absolute deviation, the ...
*March 4, 2016 by Overwhelmed *

**maths**

I have y=5sin(4x-pie/2). I need too find phase shift. I know c/b is shift. This is pie2/4=.392, but does not equal my answer and I don't know direction it should go. Can anyone help? What do you mean by c/b? What do you mean by pie2/4=.392? What phase shift are you trying to ...
*December 9, 2006 by matt*

**math mean median mode**

which of the following shows the order from least to greatest for the mean, the median, and the mode of this set of data? a) mode , median, mena b) median, mode , mean c) mode, mean, median d) mean, median, mode i dont understand what the question is about?
*October 6, 2011 by marko*

**satistics**

3.Give the mean for the mean column of the Worksheet. Is this estimate centered about the parameter of interest (the parameter of interest is the answer for the mean in question 2)? Mean 3.50 Standard deviation 1.317 4.Give the mean for the median column of the Worksheet. Is ...
*December 4, 2011 by charlene*

**maths**

collect marks of 10 of your classmates in different subjects in the recent examination. estimate the arithmetic mean of marks in each subject and verify them by actual calculations.how many of your estimations represent exact mean?
*October 25, 2015 by mudassir*

**Maths**

Hi there, I'm currently stuck on a maths question. Find the limit as x approaches 0 for (1+sinx)^cotx I've put logs on both sides and am attempting to use hopitals rule but don't know where to proceed from here.
*October 19, 2014 by Ss*

**Data Management **

Could you help me with this math question. The mean of 4 numbers is 5 and the mean of 3 different numbers is 12. What is the mean of the 7 numbers combined? Produce an algebraic solution.
*March 2, 2015 by Mabel*

**Year 11 Maths B**

The mean mass of 35 bags of potatoes on a truck is 49 kg. Eight more bags of mean mass 53 kg are added to the truck. What is the new mean mass of the potatoes? Round your answer to the nearest whole kg.
*May 24, 2012 by Rianna*

**algebra 1 question pls help!!!**

1. Find the mean, median, and mode of the data set: 15, 16, 21, 23, 25, 25, 25, 39 a.mean = 23.6, median = 25, mode = 24 b.mean = 24, median = 23.6, mode = 25 c.mean = 24.6, median = 24, mode = 25 d.mean = 23.6, median = 24, mode = 25 This is what i got: Mean - 23.4 Median - ...
*April 13, 2014 by TTR+S<3*

**Maths**

If I have the mean and standard deviation of data how do I work out the percentage of data within 1,2,and 3 standard deviations of the mean? :) any help would be much appreciated thanks
*October 22, 2011 by Zani*

**Math**

What does this question mean Find the zeros of the following equation y=(x+1)(x-3) Does it mean. 0=(x+1). Or 0=(x-3) x=-1. Or x=3
*August 27, 2014 by Elizabeth*

**Statistics/probability/maths**

Please I Need Help With This Question Showing All Steps...Thank You :) The average number of units that the factory workers at Benzo company assemble per week is μ = 45 with a standard deviation of σ = 12. Assume that the distribution of units assembled is normal. ...
*August 2, 2011 by evangeline johnny*

**Maths **

Four numbers have a mean of 6. Two numbers are added and the mean increases by 1. One of the numbers is twice the other. What were the numbers?
*November 30, 2015 by Anon*

**Statistics**

For a population with a mean of (mew) = 50 and a standard deviation of 10, how much error, on average, would you expect between the sample mean (M) and the poulation mean for: a) a sample of n=4 scores b) a sample of n=16 scores c) a sample of n=25 scores Are the sample mean (...
*May 24, 2011 by Aestas*

**QNT/351**

Describe a business situation, other than what has already been selected by fellow students or selected from the team assignment, where mean and standard deviation can be used in decision making. Describe how calculation of mean and standard deviation can help in making a ...
*November 26, 2013 by Karen*

**Math **

Can anyone help me with this question. What's the best answer? Choose from these answers: [(A):variance] [(B):standard deviation] [(C):sample mean] [(D):s-squared] [(E):unbiased estimate] 1.subtract the mean of all the scores from each score, then square that number and get ...
*April 24, 2015 by Anonymous*

**maths-urgently needed**

If the mean of y1 and y2 is M1 and that of y1, y2, y3, y4 is M2, the mean of ay1, ay1.y3/a, y4/a is
*April 2, 2013 by anoynomous*

**What does this Maths B question mean?**

How do I do thi question? An example of a wine glass design, using three equations, is given below. The base of the wine glass is defined by a quadratic equation, the stem by a linear equation and the body of the glass by a square root function. The difficult part of the task(...
*July 28, 2012 by Nina*

**Maths**

If mean of 1, 2, 3, --------- n is 6n/11, then n is
*July 26, 2011 by Sharon*

**maths**

what is the mean for 20,14,18,16,27,20,14,18,22,27,16
*November 5, 2011 by dorcas*

**Maths plz help**

A test contain of 12 question out of which candidate are to answer 10.if the first 6 question are compulsory,in how many ways can each candidate select her question????? Plz show working
*October 20, 2015 by Franklin:*

**Statistics**

Please help!! I have no idea how to do this question. 14. A sample of 40 CD’s from your collection showed a mean length of 52.74 minutes with a standard deviation of 13.21 minutes a. Construct the 95 percent confidence interval for the mean. b. Construct the 95 percent ...
*October 31, 2011 by Kristi*

**Maths - Reciprocals**

1. Give an example of a quadtratic whose recirpocal has no vertical asymptotes Ans. y = x^2 - 2x + 3 2. Compare the vertex (or turning point) of the quadratic and the corresponding feature of the reciprocal. Write down your observation. What does the question mean by ...
*August 26, 2008 by TK*

**Statistics **

Daily water intake (including water used in drinks such as coffee, tea and juice) for Canadian adults follows a normal distribution with mean 1.5 litres and standard deviation 0.31 litres. (d) Using the 68-95-99.7 Rule, approximately 95% of samples of 22 Canadian adults will ...
*November 5, 2014 by C*

**Maths**

Can pls someone explain me this ? Thank you The Browns’ gross monthly income is $2900. They have 12 remaining payments of $410 on a new car. What maximum monthly payment does the bank’s loan officer feel that the Browns can afford? For Further Reading Maths - drwls, Wednesday...
*March 19, 2008 by Mike*

**math 12**

The mean and standard deviation of a set of data are two measurments that describe the data. A certain student has written 8 out of 10 unit exams, which are equally weighted. The student misses the ninth exam and receives a score of 0. However, for the last exam, the student ...
*April 7, 2010 by Leigh*

**maths**

what is mean of these numbers 2,10,8,6,10,5,6,8?
*September 16, 2010 by anonymous*

**Math**

A set of data has a mean of 25 and an outlier of 5. You find the mean without the outlier. Which of the following best describes your new mean? A. The new mean is the same as the original mean. B The new mean is the as the meadian C. The new mean is greater than the original ...
*January 11, 2011 by Please help*

**maths**

The mean grade of 10 students was 72.if 2 of the students with grades of 53,75 are cancelled. What should be the mean grade of the remaining?
*March 6, 2013 by minte*

**Math**

Have to find the age of a family of 7. I'm told that the youngest child is 6, the oldest is 16 have a set of twins that are 15. The mean is 11 and the mean is 10. I added up all the numbers and got 73. Thought that if I added 4 I got 77 and then could get to the mean, but that...
*October 27, 2010 by Lori*

**Maths - Integration by Parts**

Question 1 ç e^2x Cos(4x) dx Question 2) ç ãx sin(x) dx Question 3) ç x^2 sin(x) dx
*November 7, 2012 by Anonymous*

**chemistry**

A piper delivers 10.04, 10.02, 10.08, and 10.06 mL in consecutive trails. Find the mean volume and the average deviation from the mean...please help some responded but didn't answer the question.
*January 31, 2012 by Lisa*

**psychology**

View the results for a hypothetical psychology test psychology test. Then, create a report with the following: The mean score for each question. The mean score for the entire test. A graph that represents the scores for each question.
*January 22, 2012 by p*

**statistics**

The average price of a gallon of unleaded regular gasoline was reported to be $2.34 in Northern Kentucky use this price as a population mean population standard deviation is $.20. question. what is the probability that the mean price for a sample of 30 station is good then $....
*September 24, 2014 by thickhoneybrown*

**maths**

coke cane...thats what i mean
*June 20, 2011 by mellissaa*

**Statistics**

A 10 question test is all multiple choice. Each question has four choices. Determine the mean number of questions answered correctly as well as the standard deviation for the number of correct answers if someone were to guess on all ten questions. So far, I have that the ...
*March 27, 2016 by Mona*

**maths**

My 1st question is: What is the cost of 1.2kg of putty at €3 a kg? And last question is: A salesman bought a car for €5,000 but later had to sell it for €4,750. How much was his loss?
*November 19, 2015 by liam*

**math- mean value theorem**

Hi I am having some trouble with these few quetions I would appreciate some help so that I can understand them better. 1) What, if anything, does the mean value theorem guarantee for the given function on this interval? a) f(x) = x^2 - 2x + 5 on [1,4] --I am a bit uncertain on...
*September 7, 2007 by manny*

**Liz**

The answer to a question is 564.90. The question said to round to the nearest ten meters. What does nearest ten meters mean. Would it mean for me to round to 570 or 565
*August 27, 2014 by Math*

**quick french question**

In the sentence "ou prenez vous des cours de maths?" can I replace "des cours de maths" with "en?"
*February 5, 2009 by rc*

**Math (Statistic)**

Considered the sampling distribution of a sample mean obtained by random sampling from an infinite population. This population has a distribution that is highly skewed toward the larger values. a) How is the mean of the sampling distribution related to the mean of the ...
*February 19, 2007 by Jennifer*

**maths**

the mean of a set of test scores is 64. a new student takes the same test and scores 80 marks. when his score is added to the other scores, the mean increases to 65. how many students sat for the test altogether?
*September 24, 2011 by jasmine*

**Statistics**

create a report with the following: the mean score for each question, the mean score for the entire test, a graph that represents the scores for each question. Evaluate the test by using the information in your report and conducting qualitative item analysis and quantitative ...
*April 9, 2012 by Bee*

**maths**

find the arithmatic mean of integers from -5 to 5
*March 8, 2015 by manavi*

**maths**

What would the equation be of a straight line that passes through the points (1,1) and (3,3) ?? write the equation for the line: y= mx+ b put the first set of points in.. 1=1m + b then the second equation 3=3m + b subtract the equations... 2=2m so you know m. Put that into ...
*June 9, 2007 by kat*

**Gratitude for my helper**

Sir steve mrs reiny sir bobpursely sir damon ms sue..... Thank you very much you guyz have really help me alot today my result came out and i score 98 out of 100 in my maths exams aldo i am still shaking in my english but with the help of ms sue i always read english question ...
*January 6, 2016 by Collins*

**maths**

A group of y numbers has mean x. If the numbers 3 and 5 are removed from the group, the mean of remaining(y-2) numbers remains unchanged. Find x.
*August 30, 2013 by keith*

**maths-statistics**

If the mean of y1 and y2 is M1 and that of y1, y2, y3, y4 is M2, the mean of ay1, ay1.y3/a, y4/a is
*April 2, 2013 by anoynomous*

**statistics**

Use the given information to find the minimum sample size required to estimate an unknown population mean μ. How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 99% confidence that the sample mean is within 4 ...
*January 16, 2015 by Sarah*

**Maths**

I have a maths exam tomorrow and am studying with a friend. We are working on a question and are getting two different answers. Could you please show us the right way to do it? 2(4x + 3)(4x - 3) - (4x + 3)squared p.s i couldn't find a squared symbol so only the last bracket is...
*March 15, 2008 by Nat*

**math 12**

The mean and standard deviation of a set of data are two measurments that describe the data. A certain student has written 8 out of 10 unit exams, which are equally weighted. The student misses the ninth exam and receives a score of 0. However, for the last exam, the student ...
*April 8, 2010 by Leigh*

**Math 12**

The mean and standard deviation of a set of data are two measurments that describe the data. A certain student has written 8 out of 10 unit exams, which are equally weighted. The student misses the ninth exam and receives a score of 0. However, for the last exam, the student ...
*May 20, 2010 by Leigh*

**maths exponential functions**

I have a maths assignment and i need help with this question my teacher is overseas at the moment and it is due when he gets back The Population P, of penguins in a certain region of Antarctica can be modeled by the relation P=Po (2) t/90, where t is time, measured in months ...
*March 11, 2011 by Josh*

**MATHS**

WHAT DOES THEORETICAL PROBABILITY MEAN HOW DO I WORK IT OUT?
*March 1, 2008 by Rosh*

**maths**

prove that 1+x < e^x < 1+ xe^x for x>0 using the mean value theorem
*December 9, 2009 by lara*