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Posts tagged with statistics

An Albatross, Hole is One, and an Eagle

March4

New Zealand golfer Amelia Garvey has pulled off a remarkable feat in a US tournament, becoming the first professional to ever record an albatross, a hole-in-one and an eagle on three separate holes of a round. Competing in the final round of the Royal St. Cloud Women’s Championship on the NXXT Tour, Garvey shot a final-round […]

Air Accidents, Statistically Speaking

February9

Air travel is the safest mode of transport. In 2019, there were just under 70 million flights globally, with only 287 fatalities. According to the US National Safety Council’s analysis of census data, the odds of dying in a plane are about 1 in 205,552, compared with 1 in 102 in a car. Even so, […]

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Math on the Trail of Nessie and Bigfoot

January23

In the field of cryptozoology – the study of animals which have not yet been proven to exist – there are no bigger questions than what is Bigfoot and the Loch Ness monster. Now, a scientist has used statistics to try and explain the legends of two of the world’s most high profile urban myths. […]

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A good education too complex to be reduced to a single number

September23

From CNN: The scandal engulfing Columbia University and U.S. News & World Report rose to a new level last week, when Columbia acknowledged that some of the figures it had submitted last year to U.S. News were inaccurate. U.S. News initially removed Columbia from its ranking entirely, then demoted it from second to 18th place […]

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Fear and Greed in a Dynamic Pie Graph

July8

The Fear & Greed Index is a way to gauge stock market movements and whether stocks are fairly priced. The theory is based on the logic that excessive fear tends to drive down share prices, and too much greed tends to have the opposite effect. How is Fear & Greed Calculated? The Fear & Greed […]

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We Use Statistics Every Day

April14

It was a crazy idea—to skateboard across Australia. With those snakes, deserts, and wilderness, it could be…very dangerous! Mathematics comes to the rescue in the form of summary statistics. Students often overlook the importance of using statistics for practical activities. Statistics are widely used across all sports. Check out more about Tom Dury’s 4000km trek […]

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6 Good Reasons to Like Algebra

September5

1) Algebra is Faster And Better Than “Basic” Math Just as multiplying two by twelve is faster than counting to 24 or adding 2 twelve times, algebra helps us solve problems more quickly and easily than we could otherwise. Algebra also opens up whole new areas of life problems, such as graphing curves that cannot […]

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Algorithms are not Al-ways right!

August24

Philip is among 300,000 pupils in England, Wales and Northern Ireland who woke on August 13 to critically important A-level exam results. These exams were cancelled this year due to the pandemic. Student marks were instead determined by an algorithm, which was chosen by the government’s exam regulator. The model drew on a collection of data […]

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Another Dubious COVID Graph

May26

What is wrong with this graph – an official one designed to help the UK public understand COVID-19. Here, we see a humped curve that slowly decreases and suggests steps to ease lockdown along the way. Critically, there is no relation between the steps in the graph and the alert level, so we have to […]

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What’s wrong with this Cold-19 Graph?

May14

The following graph was released today and, at first glance, seems to put New Zealand at the forefront of testing for COVID-19. However, there are some problems with it, giving our growing mathematicians an excellent object lesson in visual data. The graph, which uses data supplied by health agencies from around the world, has been […]

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Post Support

Largest number between o and 1 million which does not contain the ‘n’ is 88

 

Rotation SAT Problem: Answer: 4 (see: https://www.youtube.com/watch?v=FUHkTs-Ipfg)

 

Which number has its letters in alphabetical order? Answer: F O R T Y

Hidden Rabbit? Clue: check the trees

How long for the stadium to fill? 45 minutes.

Where are you? the North Pole

Prize Object Puzzle: If Sue does not know where the prize is in the first question, it can’t be under the square. She must have been told it is under another shape. Apply this same logic to Colin. It is then obvious that the prize cannot be under a yellow object. That helps Sue eliminate her yellow shapes. Got the idea?

Algebra Puzzle: Answer = 1

Popular Math Problems Answers: 1, 1

Number of tabs? According to Lifehacker, the ideal number of tabs you should have open is nine. Yes, a single digit. To some, this is like playing a piano and only using a fraction of the notes!

Worst Graph? Where to start. What a visual mess and even some of the lines merge and are impossible to follow. A graph is a visual display of data, with the goal to identify trends or patterns. This is a spider’s web of information which fails to show a clear pattern at all. Solution? Well, different colors would help, or why not group in two or three graphs where trends are similar?

Number of different nets to make a cube is eleven – see this link

Homework Puzzle; The total value of the counters is 486, so halve this to get 243. Now, arrange the counters to equal this amount twice.

The graph on the left (Coronavirus) is for a time period of 30 days, while the one on the right (SARS) is for 8 months! Very poor graphical comparison and hardly relevant, unless it is attempting to downplay the seriousness of the coronavirus?

10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

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