40 articles trouvés pour ce sujet.
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Maths |
1999-01-11 |
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Stephane Roissard pose la question : Soit ABC un triangle dans lequel les trois médianes sont de meme longueur. Montrer que ce triangle est quilatéral. Jack LeSage lui répond. |
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A median of a triangle |
2019-01-24 |
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Anna pose la question : For triangle J(1,4) K(-3,-1) L(3,4), find an equation for the median from vertex J Penny Nom lui répond. |
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The mean and median |
2018-03-24 |
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Myrte pose la question : Is the median always smaller then the mean? Penny Nom lui répond. |
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The median |
2010-04-18 |
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amper pose la question : How could i get the median with this equation f(x)=(x^2+4)3/13 0 Harley Weston lui répond. |
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The median |
2010-04-10 |
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Ayssa pose la question : The median of the data set (24, 35, 30, 12, 40, x) is 28. What is the value of x? Robert Dawson and Penny Nom lui répond. |
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A triangle with two equal medians |
2009-12-19 |
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Nazrul pose la question : If two medians of a triangle are equal , how can I prove that the triangle is isosceles. Chris Fisher lui répond. |
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The three medians of a triangle |
2009-11-18 |
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Nazrul pose la question : If the three medians of a triangle are equal, how can I prove (without using the property that the three medians of a triangle cut one another at a point of trisection) that the triangle is equilateral. Chris Fisher lui répond. |
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The median is greater than the mean |
2009-08-14 |
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Shawna pose la question : If the median is greater than the mean on a set of test scores, describe the situation. Robert Dawson lui répond. |
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The intersection of the medians |
2008-08-18 |
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Katie pose la question : Q: A Triangle is positioned with one side on the x-axis, the coordinates
for the triangle are (-a,0), (a,0), (b,c)
a) Find the coordinates of the point of intersection of the perpendicular
bisectors of the sides
b) Find the coordinates of the point of intersection of the medians
c) Find the coordinates of the point of intersection of the altitudes Penny Nom lui répond. |
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Similar Triangles Given a Median |
2008-08-17 |
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RAM pose la question : Sides AB , AC and median AD of a triangle ABC are respectively proportional to
PQ PR and median PM of another triangle PQR. Show that ABC is similar to PQR Janice Cotcher lui répond. |
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The mean, the median and the mode |
2008-06-23 |
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Crystal pose la question : Hi my name is Crystal,
My question is
under what circumstances will the mean, the median, and the mode all have the same value? Stephen La Rocque and Harley Weston lui répond. |
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The median |
2008-01-02 |
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tanya pose la question : A triangle has vertices at A(-3, 2) B ( -5,-6) and C (5,0)
Find the equation of the line containing the median from the vertex A. Stephen La Rocque lui répond. |
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A decision based on data |
2007-12-04 |
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manny pose la question : You have administered a standardized test of manual dexterity to two groups of 10 semi skilled workers. One of these two groups of workers will be employed by you to work in a warehouse with many fragile items. The higher the manual dexterity of a worker the less likelihood that worker will break significant inventory. Because of a unique contract you must hire all 10 employees from one of the two groups and none of the employees from the other.
You must decide which group to choose. Choose at least two measures of central tendency and at least one measure of dispersion for each group and use those to make your choice. Be sure to justify your choice with at least one page of discussion and analysis. Penny Nom lui répond. |
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Grouped data |
2007-10-08 |
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Nimra pose la question : The following sets of data represent the distributions of
house prices in the north-east and south-west of a country.
Random samples of 100 houses were selected in each region.
(a) Calculate the mean, median and standard deviation for Harley Weston lui répond. |
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Slopes of a triangle's medians |
2007-08-11 |
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Gina pose la question : I am trying to help my daughter with this, but I am very weak in Math.Please help!
Find slopes of the medians of a triangle whose vertices are P(1,3), Q(3,5), and R(6,2) Stephen La Rocque lui répond. |
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A problem concerning the medians of a triangle |
2007-08-01 |
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leeja pose la question : In a triangle ABC the sides BC and AC are given. It is also known that
the medians to these sides are perpendicular to each other. Calculate the
length of AB in terms of the other two given sides. Chris Fisher lui répond. |
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The "mode" of a set of numbers |
2007-06-06 |
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Anthony's mom pose la question : we have a graph: Kindergarten has 1, 1st has 5, 2nd has 4, 3rd has 3
is the mode "1st grade" because there are more children in that grade? Stephen La Rocque lui répond. |
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Using a stem and leaf plot |
2007-05-22 |
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Maegan pose la question : The students in Mr.Smiths PE class collected data on the number of sit ups the students were able to do in three minutes. Use the data to create a stem and leaf plot. What is the median for the class data? range? mode? Penny Nom lui répond. |
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Can you have median < mode < mean? |
2007-04-11 |
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Kaliela pose la question : Can the Median > mode > mean?
Can the Mean > Mode > Median?
I don't think either of these can occur but I'm unsure why? Penny Nom lui répond. |
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A missing observation |
2007-04-02 |
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destinee pose la question : please help me my problem is 5,11,19,3,15,17,5,n find n given the following info.range:16 mode:5 median:8 mean:10 what the heck is the answer Penny Nom lui répond. |
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Upper Quartiles |
2007-01-26 |
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Jamie pose la question : I see you have a question about Q3 with even numbers but what about odd numbers? I have a problem with 19 numbers 36,45,49,53,55,56,59,61,62,65,67,70,75,81,82,86,89,94,99. Is there anyway the answer could be 81.5 because every time I do it I get 82 and my teacher tells me that is wrong. So in conclusion how do you do it? Penny Nom lui répond. |
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Where do the medians of a triangle meet? |
2007-01-02 |
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Brittany pose la question : Where do the medians of a triangle meet? 1. Inside the triangle v 2. On the traingle 3. Outside the traingle Stephen La Rocque lui répond. |
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The median |
2006-09-26 |
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Sam pose la question : How do you find the median in a group of numbers? Stephen La Rocque and Penny Nom lui répond. |
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Stem-and-leaf plots, box-and-whisker plots and medians |
2006-02-21 |
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A student pose la question : explain which plot would be easiest to use to find the median....box-and-whiskers plot or stem-and-leaf plot Penny Nom lui répond. |
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The median |
2006-01-27 |
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Wael pose la question : " median"; what does it mean and how do we calculate it? Penny Nom lui répond. |
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Stewart's Theorem |
2005-01-17 |
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Amy pose la question : In triangle ABC, AB=4, AC=6 and AD=5, where D is the midpoint of BC. Determine BC. Chris Fisher lui répond. |
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The point where all the medians meet |
2004-02-25 |
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A student pose la question : What's the name of the point where all the medians meet? Penny Nom lui répond. |
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The median |
2003-12-03 |
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Christiane pose la question : how do you find the median of this group of numbers:63,75,29,37,49? Penny Nom lui répond. |
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Collinear Points |
2003-01-13 |
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Gary pose la question :
Which of the 4 points are collinear when you construct the following concurrent lines or rays of a triangle? - P(1), the point where the angle bisectors intersect.
- P(2), the point where the altitudes (or extensions) intersect (inside or outside of the triangle).
- P(3), the point where the medians intersect.
- P(4), the point where the perpendicular bisectors (or extensions) of the three sides of a triangle intersect.
This is for my 9-12 high school class in geometry. My name is Gary Thanks for your help. Gary
Harley Weston and Chris Fisher lui répond. |
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Mean and median |
2003-01-04 |
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Jan pose la question :
I have a question re: mean and median. I know what the difference is but just need some clarification on when you would use the mean and when you would use the median. Isn't it the case that with a skewed distribution the average (mean) would be higher or lower than the median, but with a normal distribution they would be very similar values? If you have any examples to help explain this that would be greatly appreciated. I am a teacher (of sorts!) and the person who is asking me the question is actually my boss! Penny Nom lui répond. |
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Mean, median and mode |
2002-09-08 |
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Ramona pose la question :
- How do you calculate the mean, median, and mode?
- what are each of their definitions?
Leeanne Boehm lui répond. |
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The Dugout, Don's Basement, Cd Corner,... |
2002-04-30 |
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A student pose la question : The Dugout, Don's Basement, Cd Corner, Harry's Deli, Bill's Software, Anne's Footwear, and Joanne's House cleaning. The gift certificates are each in multiples of $5. There is a $100 range in the value of the gift certificates, which start at $25. The mean value of all seven gift certificates is $80, and the median and mode are both $70. The certificate from The Dugout is worth the most and the one from Joanne House cleaning is worth the least. The total value of the gift certificates from CD Corner, Harry's Deli, and Anne's Footwear is $270, but Anne's Footwear certificate is worth $50 more than the one from Harry's Deli. The Cd Corner gift certificate is equivalent to the mean for this group of three. What is the value of the gift certificates from each store? Penny Nom lui répond. |
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The median with ties |
2002-02-27 |
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Marcel pose la question : What, exactly, is the proper way to determine the median of a set of numbers when doubles or triples of a number are part of that set? Do the doubles count as two and the triples three, or does each count only as one toward determining the median. Harley Wston lui répond. |
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Prove that the medians of triangle PQR meet in a central point G. |
2001-11-11 |
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Jessica pose la question : Use a scalene triancle with one point (0,b) on the y axis, another point (2c, 0) on the x-axis and the last point, (2a,0) on the x-axis. Prove that the medians of triangle PQR meet in a central point G. Penny Nom lui répond. |
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The median of a trapezoid |
2001-10-01 |
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Laura pose la question : Given: A (1,2) B (9,-2) C (7,2) D (3,4) Find the endpoints of the median. Use exact values. Write the equation using the letters from the given trapezoid. Verify the theorem using algebra. Penny Nom lui répond. |
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What is the difference between Mean and Average? |
2000-12-13 |
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Julie pose la question : What is the difference between Mean and Average? My thinking is the average, is the equal to the sum of all numbers divided by the number of numbers added together. But the mean, I think should be calculated by adding the largest and smallest numbers in the set and them dividing by 2. (which is the point where 1/2 the numbers are higher and 1/2 the numbers are lower) Patrick Maidorn and Penny Nom lui répond. |
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Absolute value |
1999-12-29 |
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Alex Waller pose la question : What are some practical applications for absolute value? Harley Weston lui répond. |
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Mean, median and mode |
1999-12-07 |
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J William Morning pose la question : Using the data values 2,2,10,6,5, determine the median, mode and mean. Penny Nom lui répond. |
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Mean, median and mode |
1999-11-06 |
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Rick pose la question : I have five number places and the mean and median are both "0". The mode is greater than the mean. The sum of the absolute values of all of the numbers is 20. The smallest number is 4 less than the next smallest number. What are the five numbers. (negative integers can be used) All of the numbers are integers. Penny Nom lui répond. |
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Concurrent Lines in a Triangle |
1998-08-10 |
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Chris Woolf pose la question : The question is Name four types of concurrent lines, rays, or segments that are associated with triangles. Chris Fisher lui répond. |
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