To identify:The error in the hypothesis test.

Braxton Pugh
2020-12-28
Answered

To identify:The error in the hypothesis test.

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asked 2020-11-17

the sampling method for the given scenario.

asked 2022-07-03

asked 2022-07-02

For simple ones, like quadratic equations, I can usually find the minimum point and give a correct answer.

But take, for example:

$f(x)=\frac{3}{2x+1},x>0$

and

$g(x)=\frac{1}{x}+2,x>0$

I am so confused with the whole process of finding the ranges of functions, including those above as samples, that I can't even quite explain what or why.

Can someone please, in a very step-by-step process, detail exactly what steps you would take to get the ranges of the above functions? I tried substituting x-values (such as 0), and came up with $f(x)>3$, but that was mostly guesswork -- also, $f(x)>3$ is incorrect.

Also, is there an outline I can follow -- even for the thinking process, like check if A, check if B -- that would work every time?

But take, for example:

$f(x)=\frac{3}{2x+1},x>0$

and

$g(x)=\frac{1}{x}+2,x>0$

I am so confused with the whole process of finding the ranges of functions, including those above as samples, that I can't even quite explain what or why.

Can someone please, in a very step-by-step process, detail exactly what steps you would take to get the ranges of the above functions? I tried substituting x-values (such as 0), and came up with $f(x)>3$, but that was mostly guesswork -- also, $f(x)>3$ is incorrect.

Also, is there an outline I can follow -- even for the thinking process, like check if A, check if B -- that would work every time?

asked 2021-02-22

Conditional probability if $40\mathrm{\%}$ of the population have completed college, and $85\mathrm{\%}$ of college graduates are registered to vote, what percent of the population areboth college graduates andregistered voters?

To find: The percent of people who is both college graduates and registered voters.

To find: The percent of people who is both college graduates and registered voters.

asked 2022-06-16

Sometimes when solving very sparse equation systems

$Ax=b$

with conjugate gradient using computers, if A is a very sparse matrix, it can be difficult to utilize the hardware computational power maximally

Does there exist some way to rewrite

$Ax=b\text{or}{A}^{T}Ax={A}^{T}b$

to be able to utilize hardware better?

One idea I had is that often ${A}^{2},{A}^{3}$ et.c. are increasingly non-sparse. Maybe it would be possible to take multiple steps at once..?

One motivation why this should be possible is that the Krylov subspaces which the Conjugate Gradient investigates are precisely the powers of the matrix. A second motivation why this is possible is of course Caley Hamilton theorem

$P(A)=0\Rightarrow {A}^{-1}={P}_{2}(A)$

For some polynomial ${P}_{2}$ other than P.

$Ax=b$

with conjugate gradient using computers, if A is a very sparse matrix, it can be difficult to utilize the hardware computational power maximally

Does there exist some way to rewrite

$Ax=b\text{or}{A}^{T}Ax={A}^{T}b$

to be able to utilize hardware better?

One idea I had is that often ${A}^{2},{A}^{3}$ et.c. are increasingly non-sparse. Maybe it would be possible to take multiple steps at once..?

One motivation why this should be possible is that the Krylov subspaces which the Conjugate Gradient investigates are precisely the powers of the matrix. A second motivation why this is possible is of course Caley Hamilton theorem

$P(A)=0\Rightarrow {A}^{-1}={P}_{2}(A)$

For some polynomial ${P}_{2}$ other than P.

asked 2020-10-18

To calculate:

The points needed on the final to avetage the points to 75.

Given information:

Grades in three tests in College Algebra are 87, 59 and 73.

The average after final is 75.

The points needed on the final to avetage the points to 75.

Given information:

Grades in three tests in College Algebra are 87, 59 and 73.

The average after final is 75.

asked 2021-10-04

Pure acid is to be added to a 20% acid solution to obtain 28 L of a 40% acid solution. What amounts of each should be used?