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
vovikov84 [41]
3 years ago
7

A researcher wishes to estimate the proportion of all adults who own a cell phone. he takes a random sample of 1,572 adults; 1,2

98 of them own a cell phone, hence 1298∕1572 ≈ .83 or about 83% own a cell phone. what is the population of interest? what is the parameter of interest? what is the statistic involved? based on this sample, do we know the proportion of all adults who own a cell phone? explain fully.
Mathematics
1 answer:
zhuklara [117]3 years ago
8 0

solution:

a) The population of interest is all the adults

b) The parameter of interest is p, the proportion of adults who own a cell phone

c) The statistic is the proportion, p^, of the sample of 1572 adults who own a cell phone. The value of the sample proportion is 0.83.

d) We dont the the exact proportion with 100 % but we know that the proportion would lie in a certain range with certain degree of confidence


You might be interested in
If the volume of the bat is 82
Assoli18 [71]

The volume that is left to be filled is approximately: 3,332.6 in.³

<h3>What is the Volume of a Box?</h3>

Volume of a box = (length)(width)(height)

Given the following:

Volume of the bat = 82 cubic in.

Length of box = 30 in.

Width = 18.97 in.

Height = 6 in.

The remaining volume to be filled = volume of box - volume of bat

= (30)(18.97)(6) - 82

= 3,332.6 in.³

Learn more about the volume of a box on:

brainly.com/question/14957364

#SPJ1

4 0
2 years ago
M
xxTIMURxx [149]

Answer:

A

Step-by-step explanation:

To answer this, look at one specific point for example, A. It is at the point (3,6). In order for this point to get to where it was moved to, you must rotate it counterclockwise () 90 degrees. Do this by changing the initial point from (x,y) to (-y,x). This is located at (-6,3). Then you can see that it was translated 2 units up from there.

I hope this helped.

3 0
2 years ago
Use the order of operations to simplify 8.6 - 4 × 2 + 3/10
Ainat [17]
The answer is A!
Explanation:
43/5-4x2+3/10
Multiply the numbers——> 43/5-8+3/10
43/5-8+3/10=9/10

Hoped I help ! Mark me brainly if correct it would help a lot! Have a great day!
8 0
2 years ago
Read 2 more answers
Just need help on #7 thru 8(a), b and c
Stella [2.4K]

7

a. The slope of the line passing through the points R(3, 5) and H(-1,2) is -3/4

b. The distance between two points (x₁, y₁) and (x₂,y₂) is 5 units

c.  The midpoint of the R(3, 5) and H(-1,2) is  (2, 4)

8.

a. The transformation rule is  (x,y) → (x + 1, y - 1)

b.

  • The x-coordinate is shifted 1 unit to the left and
  • The y - coordinate is shifted 1 unit downwards.

c. The image of B' the pre-image of B(5, 6) is (6, 5)

<h3 /><h3>7 a. How to find the slope of the line?</h3>

The slope of a line passing through the points (x₁, y₁) and (x₂,y₂) is m = (y₂ - y₁)/(x₂ - x₁)

Given that

  • (x₁, y₁) = (3, 5) and
  • (x₂,y₂) = (-1, 2)

So, m = (y₂ - y₁)/(x₂ - x₁)

m = (2 - 5)/(-1 - 3)

m = -3/-4

m = -3/4

So, the slope of the line passing through the points R(3, 5) and H(-1,2) is -3/4

<h3>b. The distance between the points</h3>

The distance between two points (x₁, y₁) and (x₂,y₂) is d = √[(y₂ - y₁)² + (x₂ - x₁)²]

Given that

  • (x₁, y₁) = (3, 5) and
  • (x₂,y₂) = (-1, 2)

d = √[(y₂ - y₁)² + (x₂ - x₁)²]

d = √[(2 - 5)² + (-1 - 3)²]

d = √[(-3)² + (-4)²]

d = √[9 + 16]

d = √25

d = 5 units

So, the distance between two points (x₁, y₁) and (x₂,y₂) is 5 units

<h3>7 c How to find the midpoint of the R(3, 5) and H(-1,2) </h3>

The midpoint of the the points (x₁, y₁) and (x₂,y₂) is (x, y)  = [(x₁ + x₂)/2, (y₁ + y₂)/2]

Given that

  • (x₁, y₁) = (3, 5) and
  • (x₂,y₂) = (-1, 2)

So, the midpoint (x, y)  = [(x₁ + x₂)/2, (y₁ + y₂)/2]

(x, y)  = [(3 + (-1))/2, (5 + 3)/2]

(x, y)  = [(3 - 1)/2, (5 + 3)/2]

(x, y)  = [4/2, 8/2]

(x, y)  = (2, 4)

So, the midpoint of the R(3, 5) and H(-1,2) is  (2, 4)

<h3>8. a The rule for the transformation of point A(1, 4) to point B(2, 3)</h3>

Given that point A(1, 4) and point B(2, 3) we see that point B(1 + 1, 4 - 1).

Let pont A be (x,y).

So, point B = (x + 1, y - 1)

So, the transformation rule is  (x,y) → (x + 1, y - 1)

<h3>b. Describe the transformation</h3>

Since the transformation rule is   (x,y) → (x + 1, y - 1), we see that

  • the x-coordinate is shifted 1 unit to the left and
  • the y - coordinate is shifted 1 unit downwards.
<h3>c. The image of B' the pre-image of B(5, 6)</h3>

Since the transformation rule is  (x,y) → (x + 1, y - 1) and point B is (5, 6), thus the image of B' is

(x,y) → (x + 1, y - 1)

(5,6) → (5 + 1, 6 - 1)

(5,6) → (6, 5)

So, the image of B' the pre-image of B(5, 6) is (6, 5)

Learn more about slope of a line here:

brainly.com/question/1617757

#SPJ1

3 0
2 years ago
Algebra help please 100% correct only
shutvik [7]
2x + 3y + 2(x - y) - 3x


First you apply the distributive property:

2x +3y + 2(x) - 2(y) - 3x
2x + 3y +2x - 2y - 3x

The you combine like terms:

2x + 2x - 3x +3y - 2y
4x - 3x + y
x (x could also be 1x) + y (y could also be 1y)

The answer is x + y or 1x + 1y
5 0
3 years ago
Read 2 more answers
Other questions:
  • 3.<br> The perimeter of a square garden is 12 km. Find its area.
    7·2 answers
  • The table shows the scores that Ms. Cohen’s students earned on the Chapter 6 and Chapter 7 tests.
    14·2 answers
  • What is true about the completely simplified sum of the polynomials 3x squared y squared minus 2 x y to the power of 5 and negat
    12·1 answer
  • Pls help 7th grade math your a life saver ❤
    8·2 answers
  • Slope.<br> 31) through:(-1,-4). slope = -9<br> Please help
    15·1 answer
  • A geyser erupts every fourth day. Another geyser erupts every sixth day. Today both geysers erupted. In how many days will both
    10·1 answer
  • URGENT DUE SOON!! IF ANYONE COULD PLEASE ANSWER THE QUESTIONS ON MY PROFILE THAT WOULD BE AMAZING!!!
    9·1 answer
  • I WILL GIVE BRAINLIEST I NEED HELP
    8·1 answer
  • Calculate the area of this trapezium.<br> 9 cm<br> 6 cm<br> 15 cm
    15·1 answer
  • 30 points! This table shows how long it took five students to complete their science projects.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!