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
Ahat [919]
3 years ago
12

A researcher has participants choose between three advertisements. She finds that 54 prefer Ad A, 86 prefer Ad B, and 60 prefer

Ad C. The probability or proportion of participants preferring Ad B is ______.
Mathematics
1 answer:
sukhopar [10]3 years ago
3 0

Answer:

43% (or 0.43)

Step-by-step explanation:

The probability or proportion of participants preferring Ad B = number of participants preferring Ad B/ total number of participants

= 86 / (54 + 86 + 60)

= 0.43

= 43%

You might be interested in
. Use the statistical features of your calculator to find the mean and the standard deviation to the nearest tenth of a data set
uysha [10]

Answer:

Mean = 1.9

Standard deviation = 0.6

Step-by-step explanation:

The Mean is calculate by the formula:

Mean = \frac{\text{Sum of all the observation}}{\text{Total number of observation}}

⇒ Mean = \frac{24.9+24.7+24.7+23.4+27.9}{5} = 1.85

Thus Mean to the nearest tenth is 1.9

Standard Deviation is the square root of sum of square of the distance of observation from the mean.  

Standard deviation(\sigma) = \sqrt{\frac{1}{n}\sum_{i=1}^{n}{(x_{i}-\bar{x})^{2}} }

where, \bar{x} is mean of the distribution.

Putting all values in the formula, We get

Standard Deviation = 0.597 ≈ 0.6

6 0
3 years ago
What is the a-value of the function, then determine if the graph opening up or down f(x)=−5(x+7)2+6?
Kay [80]
We know that
the equation of the vertical parabola in the vertex form is
<span>y=a(x-h)²+k
</span>where 
(h,k) is the vertex of the parabola
if a> 0 then
 the parabola opens upwards

if a< 0
then the parabola open downwards

in this problem  we have
f(x)=−5(x+7)²<span>+6
</span>a=-5
so
a< 0 -------> the parabola open downwards

the vertex is the point (-7,6) is a maximum

the answer is the option
<span>a = -5, opens down</span> 

see the attached figure

6 0
3 years ago
Read 2 more answers
What is value of x?<br><br><br><br> Enter your answer in the box.
Kryger [21]

Answer:

A number

Step-by-step explanation:

4 0
2 years ago
A number c multiplied by -2 is no less than - 3. Write this word sentence as an inequality.
antiseptic1488 [7]

Answer: -3 ≤  -2c

Step-by-step explanation:

First multiply C by -2, and make sure it's not less than -3. It can be -3, but it can't be less than.

3 0
3 years ago
The base and height of a right triangle are 20 inches and 15 inches. Find the length of the hypotenuse.
Karolina [17]

Using the Pythagorean theorem:

Hypotenuse = sqrt( 20^2 + 15^2)

Hypotenuse = sqrt( 400 + 225)

Hypotenuse = sqrt(625)

Hypotenuse = 25

Answer: 25 inches

8 0
3 years ago
Read 2 more answers
Other questions:
  • During a thunderstorm 600 millimeters of rain fell in 30 minuets.what is the millimeters per hour
    14·1 answer
  • What is the effect on the graph of the parent function f(x) = x when f(x) is replaced with f(x) + 6?
    7·2 answers
  • 21x+7y=42 and -5x+5y=10 <br>Find the solution to the system of equations​
    5·1 answer
  • Please help. Determine whether mn is parallel to kl. And why it is parallel. Will reward 20 points
    12·1 answer
  • You have to spend money to make money ! You purchase a mix of newspaper ads and online ads. Each newspaper ad cost $18.50 and ea
    8·1 answer
  • Please help me I got no root factor but I dont know if thats correct
    6·1 answer
  • Devon's Burgers cooks its burgers either well done or medium. The restaurant served 30 burgers last night, 30% of which were wel
    7·1 answer
  • -54/87 simplified to a fraction
    7·1 answer
  • I need help please please
    11·1 answer
  • (Repost) School is starting, and the teacher is giving each student 2 new pencils. She has 8 rows with 4 desks in each row. Whic
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!