Explain how 0.09 and 0.009 are related

A statistics content developer at Aplia wanted to know whether study skills are related to memory quality. She invited student v

nekit [7.7K]

Answer:

$\begin{array}{cccc}{Score\ Interval} & {f} & {Proportion} & {Percentage} & {9-10} & {29} &{0.19} & {19\%} & {7-8} & {53} & {0.34} & {34\%} &{5-6}& {50} & {0.32} & {32\%} &{3-4} & {22} & {0.14} & {14\%} & {1-2} & {1} & {0.01} & {1\%} \ \end{array}$

Step-by-step explanation:

Given

$\begin{array}{cccc}{Score\ Interval} & {f} & {Proportion} & {Percentage} & {9-10} & {29} &{0.19} & {19\%} & {7-8} & {53} & {} & {} &{5-6}& {50} & {} & {} &{3-4} & {22} & {0.14} & {14\%} & {1-2} & {1} & {0.01} & {1\%} \ \end{array}$

Required

Fill in the gaps

First, we calculate the total frequency:

$Total = \sum f$

$Total = 29+53+50+22+1$

$Total = 155$

The proportion (p) is calculated by:

$p = \frac{f}{Total}$

The percentage (P) is calculated by:

$P = p * 100\%$

For interval 7 - 8, we have:

$p = \frac{53}{155} = 0.34$

$P = 0.34 * 100\% = 34\%$

For interval 5 - 6, we have:

$p = \frac{50}{155} = 0.32$

$P = 0.32 * 100\% = 32\%$

So, the complete table is:

$\begin{array}{cccc}{Score\ Interval} & {f} & {Proportion} & {Percentage} & {9-10} & {29} &{0.19} & {19\%} & {7-8} & {53} & {0.34} & {34\%} &{5-6}& {50} & {0.32} & {32\%} &{3-4} & {22} & {0.14} & {14\%} & {1-2} & {1} & {0.01} & {1\%} \ \end{array}$

6 0

3 years ago

You have a grade of 85 & 90

faltersainse [42]

Answer:

You need to get a 95 on the next test to have a 90 grade average.

Step-by-step explanation:

(85 + 90 + n)/3 = 90

Step 1: Multiply both sides by 3

(85 + 90 + n)/3 * 3 = 90 * 3

85 + 90 + n = 270

Step 2: Subtract 85 from both sides

85 + 90 + n - 85 = 270 - 85

90 + n - 90 = 185 - 90

n = 95

Answer: You need to get a 95 on the next test to have a 90 grade average.

7 0

3 years ago

Read 2 more answers

Jeez math help please!!!!!

viva [34]

(3y^7)^3 3^3*y^(7*3)
------------ = ------------------
9y^9 9*y^9

(3y^7)^3 3^3*y^(7*3) 27*y^21 (mult. together the exponents 3 and 7)
------------ = ------------------ = --------------
9y^9 9*y^9 9*y^9

That 27/9 reduces to 3. y^(21) / y^9 reduces to y^12.

Thus, we obtain 3*y^12 (answer)

Please do the next one, asking questions if need be, and showing your work.

4 0

3 years ago

Is 2,925 more than 2,9250

k0ka [10]

Answer: 32,175

Step-by-step explanation:

2,925 + 29,250 = 32,175

hope this helps

plz mark brainleist

3 0

3 years ago

Use the matrix tool to solve the system of equations. Choose the correct ordered pair.3x + 5y = 42 6x + 5y = 54

kobusy [5.1K]

Solutions

In Matrix we use initially based on systems of linear equations.The matrix method is similar to the method of Elimination as but is a lot cleaner than the elimination method.Solving systems of equations by Matrix Method involves expressing the system of equations in form of a matrix and then reducing that matrix into what is known as Row Echelon Form.

Calculations

⇒ Rewrite the linear equations above as a matrix

$\left[\begin{array}{ccc}3&5&42\\6&5&54\\\end{array}\right]$

⇒ Apply to Row₂ : Row₂ - 2 Row₁

$\left[\begin{array}{ccc}3&5&42\\0&-5&-30\\\end{array}\right]$

⇒ Simplify rows

$\left[\begin{array}{ccc}3&5&42\\0&1&6\\\end{array}\right]$

Note: The matrix is now in echelon form.
The steps below are for back substitution.

⇒ Apply to Row₁ : Row₁ - 5 Row₂

$\left[\begin{array}{ccc}3&0&12\\0&1&6\\\end{array}\right]$

⇒ Simplify rows

$\left[\begin{array}{ccc}1&0&4\\0&1&6\\\end{array}\right]$

⇒ Therefore,

$x=4

y = 6$

5 0

3 years ago