Please help with this.I need more comparing parts and all of the corresponding parts.

Write a fraction whose numerator and denominator add up to 9

aalyn [17]

Answer:

5/4

Step-by-step explanation:

3 0

3 years ago

A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new

faltersainse [42]

Answer:

The predictive value of a positive test is 18.2%.

Step-by-step explanation:

The population screened is 300.

The true prevalence value of the Lyme disease among clinic attendees is 10\% \Rightarrow 0.10.10% = 0.10.

The proportion that sensitivity is 60\% \Rightarrow 0.6060% = 0.60

The proportion of the specificity is 70\% \Rightarrow 0.70.70% = 0.70

Step 2 of 2

We have to calculate the probability value of the predictive value of positive test.

\begin{array}{c}\\\left( \begin{array}{l}\\{\rm{Positive Predictive }}\\\\{\rm{value}}\left( {PPV} \right)\\\end{array} \right) = \frac{{{\rm{Prevalence}} \times {\rm{Sensitivity}}}}{{\left( {{\rm{Prevalence}} \times {\rm{Sensitivity}}} \right) + \left( {{\rm{1 - Prevalence}} \times 1 - {\rm{Specificity}}} \right)}}\\\\ = \frac{{0.1 \times 0.60}}{{\left( {0.1 \times 0.60} \right) + \left( {1 - 0.1 \times 1 - 0.70} \right)}}\\\\ = \frac{{0.06}}{{0.33}}\\\\ = 0.181818\\\\ = 0.182{\rm{ }}\left( {{\rm{Round to 3 decimal place}}} \right)\\\end{array}

(Positive Predictive value, PPV) =

(Prevalence×Sensitivity)/Prevalence×Sensitivity +(1−Prevalence×1−Specificity)

= (0.1×0.60)/0.1×0.60 + (1−0.1×1−0.70)

= 0.06 /0.33

= 0.181818

(Positive Predictive value, PPV) = 0.182 (3decimals)

We have to convert the PPV into percentage,

\begin{array}{c}\\PPV = 0.182 \times 100\\\\ = 18.2\% \\\end{array}

PPV=0.182×100

= 18.2%

Therefore, the predictive positive value is 18.2%.

7 0

3 years ago

a caterpillar stated at point(-2.5 -5.5) on a coordinate plane.She crawled in a straight line through the origin to point (45,y)

iren [92.7K]

Answer:

99

Step-by-step explanation:

Since the caterpillar crawled through the origin, her movement can be described by a straight line equation modeled with the points (-2.5; -5.5) and (0; 0).

The slope of a linear equation is given by:

$m=\frac{y-y_0}{x-x_0}\\m=\frac{-5.5-0}{-2.5-0}\\m=2.2$

For x = 45, the value of y is:

$y= 2.2x\\y= 2.2*45\\y=99$

The value of the y-axis is 99.

3 0

3 years ago

Marty Moses purchased a two year membership at a local fitness center. He paid $475. What will be his cost per visit if he uses

maw [93]

52 weeks = 1 year
104 weeks = 2 years

Once: 475/104 = $4.57 per visit
Twice: 475/104x2 = $2.28 per visit
Five Times: 475/104x5 = $0.91

8 0

3 years ago

Read 2 more answers

a corner self is 1/4 of a circle and has the radius of 10.5 inches. enter the area of the self in square inches. can you round i

cupoosta [38]

Answer:

The area of the shelf is 86.59 square inches

Step-by-step explanation:

The formula of the area of the circle is A = π r², where

r is the radius of the circle

∵ The corner shelf is $\frac{1}{4}$ of a circle

→ That means its area is $\frac{1}{4}$ the area of the circle

∴ The area of the corner shelf = $\frac{1}{4}$ × area of the circle

∵ Area of the circle = π r²

∴ The area of the corner shelf = $\frac{1}{4}$ × π r²

∵ The radius of the shelf is 10.5 inches

∴ r = 10.5 inches

→ Substitute the values of r in the formula of the area

∴ The area of the corner shelf = $\frac{1}{4}$ × π × (10.5)²

∴ The area of the corner shelf = 86.59014751

→ Round it to the nearest hundredth

∴ The area of the corner shelf = 86.59 square inches

∴ The area of the shelf is 86.59 square inches

8 0

3 years ago