All categories

3 years ago

A linear correlation scatterplot is also a direct proportionality. True or False

Mathematics

1 answer:

Blizzard [7]3 years ago

4 0

Answer: False

Step-by-step explanation: A linear correlation scatter plot is one which is aimed at establishing a graphical view of the relationship between two quantitative variables. A linear correlation scatter plot could either be positive which is depicted by a positive gradient which infers direct proportionality, this means an increase in variable A results in increase in variable B while a decrease in variable A results in decrease in variable B. Similarly, it could also exhibit a negative gradient which infers a inverse proportionality meaning a decrease in one variable leads to increase of the other and vice-versa. Hence, a linear scatterplot does not only exhibit direct proportionality.

You might be interested in

The cost of a jacket increased from $75.00 to $87.75. What is the percentage increase of the cost of the jacket?

beks73 [17]

1) we have to calculate the increase of the cost of the jacket.
Increase of the cost of the jacket=new price - previous price
increase of the cost of the jacket=$87.75 - $75.00=$12.75

2)Now, we calculate the percentaje incresae of the costo of the jacket by the rule of three.
$75=100%

$75------------------100%
$12.75------------- x

x=($12.75 * 100%) / $75=17%

Answer: the percentage increase of the cost of the jacket is 17%

3 0

3 years ago

The amounts of time employees of a telecommunications company have worked for the company are normally distributed with a mean o

Fynjy0 [20]

Answer:

a) 5.6 years

b) 0.4478

Step-by-step explanation:

We are given the following in the question:

Mean, μ = 5.6 years

Standard Deviation, σ = 1.9 years

Sample size, n = 18

We are given that the distribution of amounts of time is a bell shaped distribution that is a normal distribution.

a) Mean of each sample.

The best estimator of the sample mean is the population mean itself. Thus, we have:

$\mu_{x} = \mu = 5.6$

Thus, the sample mean is 5.6 years.

b) Standard error

Formula:

$S.E = \dfrac{\sigma}{\sqrt{n}}$

Putting values, we have.

$S.E = \dfrac{1.9}{\sqrt{18}} = 0.4478$

Thus, the standard error is 0.4478.

7 0

3 years ago

You randomly draw a marble out of a bag that contains 20 total marbles. 12 of the marbles in the bag are blue.

jek_recluse [69]

Answer:

Step-by-step explanation:

That means the chance of getting blue = 12/20

12/20 = 6/10

6/10 = 3/5

also, 3/5 = 60%, or .60

8 0

2 years ago

Help i need the question now lol

Stells [14]

Answer:

no yes no yes

Step-by-step explanation:

Im pretty sure thats correct

6 0

3 years ago

Read 2 more answers

A dilation has center at the origin. Which of the following is the image of the point PC - 3) for a scale

Crank

Answer:

The image of the point p is p'(\frac{1}{4},\frac{-5}{14}).

Step-by-step explanation:

The center of dilation is origin and the scale factor is \frac{1}{7}.

The coordinates of point p are

(\frac{7}{4},\frac{-5}{2})

If k is the scale factor and origin is the center of dilation, then

(x,y)\rightarrow (kx,ky)

Since the scale factor is \frac{1}{7} and the origin is the center of dilation, therefore

(x,y)\rightarrow (\frac{1}{7}x,\frac{1}{7}y)

The coordinates of image of p are

p(\frac{7}{4},\frac{-5}{2})\rightarrow p'(\frac{1}{7}\times \frac{7}{4},\frac{1}{7}\times \frac{-5}{2})

p(\frac{7}{4},\frac{-5}{2})\rightarrow p'(\frac{1}{4},\frac{-5}{14})

Therefore the image of the point p is p'(\frac{1}{4},\frac{-5}{14}).

Step-by-step explanation: hope this helps mark me as brainiest

3 0

3 years ago