1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
melamori03 [73]
2 years ago
10

The following graphs have a scale assigned to them: The area of each grid

Mathematics
1 answer:
dezoksy [38]2 years ago
6 0

The graphs that are density curves for a continuous random variable are: Graph A, C, D and E.

<h3>How to determine the density curves?</h3>

In Geometry, the area of the density curves for a continuous random variable must always be equal to one (1). Thus, we would test this rule in each of the curves:

Area A = (1 × 5 + 1 × 3 + 1 × 2) × 0.1

Area A = 10 × 0.1

Area A = 1 sq. units (True).

For curve B, we have:

Area B = (3 × 3) × 0.1

Area B = 9 × 0.1

Area B = 0.9 sq. units (False).

For curve C, we have:

Area C = (3 × 4 - 2 × 1) × 0.1

Area C = 10 × 0.1

Area C = 1 sq. units (False).

For curve D, we have:

Area D = (1 × 4 + 1 × 3 + 1 × 2 + 1 × 1) × 0.1

Area D = 10 × 0.1

Area D = 1 sq. units (True).

For curve E, we have:

Area E = (1/2 × 4 × 5) × 0.1

Area E = 10 × 0.1

Area E = 1 sq. units (True).

Read more on density curves here: brainly.com/question/26559908

#SPJ1

You might be interested in
The times a fire department takes to arrive at the scene of an emergency are normally distributed with a mean of 6 minutes and a
Kitty [74]

Answer:

Step-by-step explanation:

Let x be the random variable representing the times a fire department takes to arrive at the scene of an emergency. Since the population mean and population standard deviation are known, we would apply the formula,

z = (x - µ)/σ

Where

x = sample mean

µ = population mean

σ = standard deviation

From the information given,

µ = 6 minutes

σ = 1 minute

the probability that fire department arrives at the scene in case of an emergency between 4 minutes and 8 minutes is expressed as

P(4 ≤ x ≤ 8)

For x = 4,

z = (4 - 6)/1 = - 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.023

For x = 8

z = (8 - 6)/1 = 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.98

Therefore,

P(4 ≤ x ≤ 8) = 0.98 - 0.23 = 0.75

The percent of emergencies that the fire department arrive at the scene in between 4 minutes and 8 minutes is

0.75 × 100 = 75%

8 0
3 years ago
The distribution of number of hours worked by volunteers last year at a large hospital is approximately normal with mean 80 and
wariber [46]

Answer:

E 0.923

Step-by-step explanation:

The Z score is a measurement used in statistics to determine the relationship between a value and a mean of a group of values measured as standard deviation from the mean. The z score (z) is given as:

z=\frac{x-\mu}{\sigma}, Where μ is the mean, σ is the standard deviation and x is the value.

Given that:

σ = 7, μ = 80 and x = 90  

z=\frac{x-\mu}{\sigma}=\frac{90-80}{7} =1.43

From the normal distribution table, P(X < 90) = P(z < 1.43) = 0.923

7 0
3 years ago
I need some help please
Mama L [17]

Answer: 4

4 is the correct answer




5 0
3 years ago
Can I please get help with this?
Andrei [34K]

Answer: x = 20.

Step-by-step explanation:

x and (3x + 10) combine to form a right angle, shown in the diagram by the small square joining the perpendicular lines.

Right angles are 90 degrees, so you can add both angles to get 90:

x + (3x + 10) = 90\\\\4x + 10 = 90\\\\4x = 80\\\\x = 20

7 0
3 years ago
Find the distance between (-2,6) and (1,2)
olga nikolaevna [1]

Step-by-step explanation:

label the numbers (x,y) and (x2,y2)

write down the distance formula

replace the xs and ys by the numbers and then solve them

3 0
3 years ago
Other questions:
  • A plane has 360 total seats, which are divided into economy class and business class. For every 13 seats in economy class, there
    12·2 answers
  • jem pastes 21 photos and 15 postcards in a scrap album. she puts 3 items on each page. how many pages does jem fill in the scrap
    11·1 answer
  • HELP AS SOON AS U CAN,THX!Which statements must be true about the image of triangle MNP after a reflection across EG? select thr
    12·2 answers
  • A town has a population of 5000 people
    6·1 answer
  • HURRY 12 POINTS
    9·1 answer
  • Question 1 (0.5 points)
    6·1 answer
  • How would the intervals of the solution set differ between a polynomial inequality and a rational inequality?​
    6·1 answer
  • Q⋅(a+y)=67y+93<br> what is the answer?
    9·1 answer
  • 4(x-3)/8=y change the subject to x
    15·1 answer
  • If the equation x^2 + 16x + c = 0 has only one real solution, the value of c must equal
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!