Mathematics, 07.06.2021 22:40 cheergirl2133

A survey of 100 people in high school was used to find what subject was preferred. Fill in whats missing What's the joint frequency a 9th grader liked math?
Whats the marginal relative frequency of 9th graders surveyed
Given a student was in 10th grade, whats the likelyhood the student preferred english?
Given the subject was science, whats the likelyhood the student was a freshman?
Please help i really dont know what to do

A survey of 100 people in high school was used to find what subject was preferred. Fill in whats mi

Answers: 2

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Answer from: IHeartDarkSide03

Question: What's the joint frequency a 9th grader liked math?

Explanation:

Check out the attached image below. I've filled in the table with the missing values. The upper left corner is 3 because 7+3 = 10 in the first column. You'll fill in the other values in a similar fashion. Once we filled out the table, we can answer all of these questions. There are 3 ninth graders who like math out of 100 people total. So the final answer is 3/100 = 0.03 = 3%.

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Question: What's the marginal relative frequency of 9th graders surveyed?

10%

Explanation:

Again, refer to the table to find that there are 10 ninth graders out of 100 total. So 10/100 = 0.10 = 10% is the answer.

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Question: Given a student was in 10th grade, what's the likelihood the student preferred English?

46%

Explanation:

We only focus on the 10th graders because of the "given". There are 23 people in this row who like English out of 50 total sophomores. So 23/50 = 0.46 = 46% of the tenth graders liked English.

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Question: Given the subject was science, what's the likelihood the student was a freshman?

72.5%

Explanation:

Focus on the science column only. There are 29 freshmen out of 40 students total. We get the percentage of 29/40 = 0.725 = 72.5%

A survey of 100 people in high school was used to find what subject was preferred. Fill in whats mis

Answer from: Quest

step-by-step explanation:

for exempl this system of equations y = x - 3

y = 2x - 5

look the line : y = x -3 ( red)

the line : y = 2x -5 ( bleus)

Answer from: Quest

hence, the required result is $b-a=\left[\begin{array}{ccc}1& 1& -2\\1& 1& -2\\1& 1& -2\end{array}\right]$

step-by-step explanation:

suppose we have two matrices a and b

we will assume the two matrices

$a=\left[\begin{array}{ccc}1& 2& 3\\4& 5& 6\\7& 8& 9\end{array}\right]$

$b=\left[\begin{array}{ccc}2& 3& 1\\5& 6& 4\\8& 9& 7\end{array}\right]$

we have to compute b-a which means subtracting corresponding elements of a from b.

$b=\left[\begin{array}{ccc}2& 3& 1\\5& 6& 4\\8& 9& 7\end{array}\right]$ - $a=\left[\begin{array}{ccc}1& 2& 3\\4& 5& 6\\7& 8& 9\end{array}\right]$

$b-a=\left[\begin{array}{ccc}1& 1& -2\\1& 1& -2\\1& 1& -2\end{array}\right]$

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A survey of 100 people in high school was used to find what subject was preferred. Fill in whats mis...