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bogdanovich [222]
2 years ago
11

2.5 What is the difference between relational understanding and instrumental​

Mathematics
1 answer:
Afina-wow [57]2 years ago
3 0

Answer:

Instrumental understanding – having a mathematical rule and being able to apply and manipulate it. Relational understanding – having a mathematical rule, knowing how to use it AND knowing why it works.

Step-by-step explanation:

Instrumental understanding involves “memorising which problems a method works for and which not, and also learning a different method for each new class of problems” (Skemp 1987, p. 159), is a desire to know “some kind of rule for getting the answer” (p. 155) so that a student can “latch on it and ignore the rest”

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The average weight of a chicken egg is 2.25 ounces with a standard deviation of 0.2 ounces. You take a random sample of a dozen
n200080 [17]

Answer:

P(\bar X

P(\bar X

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Let X the random variable that represent interest on this case, and for this case we know the distribution for X is given by:

X \sim N(\mu,\sigma)  

And let \bar X represent the sample mean, the distribution for the sample mean is given by:

\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})

On this case  \bar X \sim N(2.25,\frac{0.2}{\sqrt{12}})

Solution to the problem

We want this probability:

P(\bar X

The best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}

If we apply this formula to our probability we got this:

P(\bar X

P(\bar X

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3 years ago
The slope of the line below is 2. Use the coordinates of the labeled point to find a point-slope equation of the line.
Vanyuwa [196]
Y - 9 = 2(x - 1)

This is because the base equation is below:

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Liam descended from the summit of K2 (elevation= 28,251.31 feet) to an elevation of 23,201.06 feet. How many feet did Liam desce
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Determine whether more or less than the percent budgeted was actually spent.
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The amount spent as a percentage of the budget can be found from

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For housing, this is

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For transportation, this is

... (370/36)% = 10.28% . . . . more than budget for transportation

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3 years ago
Find (f+g)(x) when f(x)=3/x+5 and g(x)=2/x
olga_2 [115]
What does that 3/x and 2/x mean? 2x and 3x or x^2 and x^3?
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