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
Lina20 [59]
2 years ago
6

Suppose a random sample of 40 students from a university were asked their ages. The table below gives a summary of the reported

ages. Report and interpret a 95% confidence interval for the population mean. Assume the necessary conditions hold.
Age # of students
18 8
19 10
20 9
21 7
22 6

Group of answer choices

(18.0, 22.0). We are 95% confident that the mean age of university students in this sample is between 18 and 22.

(A.19.4, 20.3). We are 95% confident that the mean age of university students in this sample is between 19.4 and 20.3.

(18.0, 22.0). We are 95% confident that the mean age of university students is between 18 and 22.

(19.4, 20.3). We are 95% confident that the mean age of university students is between 19.4 and 20.3.
Mathematics
1 answer:
fomenos2 years ago
4 0

Answer:

I think it is

Step-by-step explanation:

(18.0, 22.0). We are 95% confident that the mean age of university students is between 18 and 22.

You might be interested in
When graphing a polynomial function, what determines what the graph will look like at the far left side? Explain your answer.
dimulka [17.4K]

Answer:

2

Step-by-step explanation:

this will help i think this will be the answer i am not sure

8 0
3 years ago
If JM = 5x – 8 and LM = 2x – 6, which expression represents JL?
Delvig [45]
The green line is LM
The red line is JM
The blue point is at the coordinates (2/3, -14/3)


you'll have to excuse the way my graph looks. my graphing application on my computer is weird 

3 0
2 years ago
Is y= x + 2 and y= -x + 3 perpendicular lines?
Vlad [161]
I believe y=x+2 and y=-x+3 are perpendicular lines.

8 0
3 years ago
Read 2 more answers
Conveyor belts called grain elevators are used to move grain into a silo. Answer the following questions knowing that the lower
Natalka [10]

From the given information,

a. The length of the belt is 180.28 ft

b. The height of the window from the ground is 100 ft

c. The length of the ramp needed is 141.42 ft

<h3>What is the Pythagorean theorem's formula?</h3>

The Pythagorean theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two legs of the triangle. I.e., (hypotenuse)² = (opposite)² + (adjacent)²

<h3>Calculation:</h3>

It is given that,

The height of the silo is 150 feet

The distance from the belt to the silo is 100 feet

With the given measurements, a right-angled triangle is formed.

a. Finding the length of the belt:

From the diagram,

The height of the silo, sh = 150 ft

The base distance, sb = 100 ft

So, the length of the conveyor belt is the hypotenuse (bh) of the triangle formed.

On applying the Pythagorean theorem,

bh² = sb² + sh²

⇒ bh² = (100)² + (150)²

⇒ bh² = 32500

⇒ bh = √32500 = 50√13

∴ bh = 180.28 ft

Thus, the length of the belt is 180.28 ft.

b. Finding the height of the window from the ground:

It is given that the angle of elevation from the lower end of the belt(b) to a window(w) on the side of the silo is 45°.

This creates a special right-angled triangle. I.e.,

The angles of the new triangle are 90°- 45°. So, the third angle also becomes 45° (Since the sum of angles in a triangle is 180°)

So, the new triangle has angles of 90°- 45°- 45°

Thus, the new triangle is said to be an isosceles right angled triangle.

So, the two legs of the triangle are equal. I.e., sb = sw = 100 ft

Therefore, the height of the window from the ground(sw) is 100 ft

c. Finding the length of the ramp(bw) to the window:

Since we have

sw = 100 ft and sb = 100 ft

On applying Pythagora's theorem,

bw² = sb² + sw²

⇒ bw² = (100)² + (100)²

⇒ bw = √20000 = 141.42 ft

Therefore, the length of the ramp to the window is 141.42 ft.

Learn more about the Pythagorean theorem here:

brainly.com/question/343682

#SPJ1

3 0
1 year ago
Pls help I forgot how to solve this kind of problem
Maslowich

Answer:

72.1110255093 cm

Step-by-step explanation:

round it if you have to

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which ordered pairs are in a proportional relationship with (0.2, 0.3)?
    7·1 answer
  • a goat tethered to a stake by a rope has grazed the meadow over an area of 12.56msqare around it stretching the rope. i) what is
    12·2 answers
  • What is the area of the following parallelogram in square centimeters?
    13·2 answers
  • What is 1 plus 1 i need to know​
    15·2 answers
  • Which statement is true ?
    12·1 answer
  • How to solve this math -9(-6w+3u-4)
    9·1 answer
  • Directions: Using the image and the scenario provided in the trajectory scenario activity Question #1, determine the trajectory
    9·1 answer
  • (Urgent)!<br> Fill in the blank with the correct response.<br><br> Find x<br> x = _____________
    6·1 answer
  • While visiting New Orleans, Kyla and a friend decided to rent a Tandem Bike to explore City Park. Wheel Fun Rentals charges $8.5
    13·1 answer
  • The rabbit population in a certain area is 500% of last years population. There are 1,300 rabbits this year. How many were there
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!