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
stepan [7]
2 years ago
15

Select the correct answer.

Mathematics
2 answers:
Natalija [7]2 years ago
7 0
The answer is C, hope this helps!!
IRINA_888 [86]2 years ago
6 0

Answer:

The correct to the question about is simply C. A is ruled out because it doesn't represent refections

You might be interested in
In the book Essentials of Marketing Research, William R. Dillon, Thomas J. Madden, and Neil H. Firtle discuss a research proposa
MakcuM [25]

Answer:

Null hypothesis:p_{1} = p_{2}  

Alternative hypothesis:p_{1} \neq p_{2}  

z=\frac{0.179-0.15}{\sqrt{0.17(1-0.17)(\frac{1}{140}+\frac{1}{60})}}=0.500  

p_v =2*P(Z>0.500)=0.617  

So the p value is a very low value and using any significance level for example \alpha=0.05, 0,1,0.15 always p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can say the two proportions NOT differs significantly.  

Step-by-step explanation:

Data given and notation  

X_{1}=25 represent the number of homeowners who would buy the security system

X_{2}=9 represent the number of renters who would buy the security system

n_{1}=140 sample 1

n_{2}=60 sample 2

p_{1}=\frac{25}{140}=0.179 represent the proportion of homeowners who would buy the security system

p_{2}=\frac{9}{60}= 0.15 represent the proportion of renters who would buy the security system

z would represent the statistic (variable of interest)  

p_v represent the value for the test (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to check if the two proportions differs , the system of hypothesis would be:  

Null hypothesis:p_{1} = p_{2}  

Alternative hypothesis:p_{1} \neq p_{2}  

We need to apply a z test to compare proportions, and the statistic is given by:  

z=\frac{p_{1}-p_{2}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{1}}+\frac{1}{n_{2}})}}   (1)  

Where \hat p=\frac{X_{1}+X_{2}}{n_{1}+n_{2}}=\frac{25+9}{140+60}=0.17  

Calculate the statistic  

Replacing in formula (1) the values obtained we got this:  

z=\frac{0.179-0.15}{\sqrt{0.17(1-0.17)(\frac{1}{140}+\frac{1}{60})}}=0.500  

Statistical decision

For this case we don't have a significance level provided \alpha, but we can calculate the p value for this test.    

Since is a two sided test the p value would be:  

p_v =2*P(Z>0.500)=0.617  

So the p value is a very low value and using any significance level for example \alpha=0.05, 0,1,0.15 always p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can say the two proportions NOT differs significantly.  

6 0
3 years ago
PLSSS HELP!! I'LL GIVE BRAINLIEST IF RIGHT Which is the equation of a parabola with a directrix at y = 2 and a focus at (5, 0).
goldfiish [28.3K]

Answer:

First, we need to set up a (y−k)^2=4p(x−h). After plugging in all of your values, you would get (x-5)^2=-4(y-1). Now, we need to solve in terms of y by dividing each side by the factors that don't contain the variable

Step-by-step explanation:

3 0
3 years ago
Which of the following scenarios exhibits a function relation? Take the first set listed to be the domain of the relation. the s
polet [3.4K]

Step-by-step explanation:

13 colonies map need help

6 0
2 years ago
Read 2 more answers
The cost of producing a new watch is $50. At a price of $100, watches will most likely be ____ and ____.
professor190 [17]
<span>The cost of producing a new watch is $50. At a price of $100, watches will most likely be sold and good.</span>
7 0
2 years ago
Arthur shuffled a regular deck of 52 playing cards
Alik [6]

Answer:

es la f

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • PPPLLLEEEZZZ HHHEEELLLPPP Select from the drop-down menu to correctly identify the property shown.
    10·2 answers
  • Your school football team has 10 scheduled games for the season. You want to attend at least 4 games. How many different combina
    9·1 answer
  • Megan bikes west to get from her apartment to school after school she bikes 8 miles north to her friends house how far is megans
    13·1 answer
  • The circumference of a circle with a radius of 5, using 3.14 for pi, to the nearest tenth
    6·1 answer
  • Triangle QRS is dilated according to the rule DO,2 (x,y).
    7·2 answers
  • Let f(x) = x2- 3x - 7. Find f(-3)
    11·1 answer
  • The linear function A(t)= 55t + 120 represents the amount, A, in Normans saving account where T represents time in weeks since h
    13·1 answer
  • What is the area of the following circle?
    9·2 answers
  • A wire is first bent into the shape of a rectangle with width 7in and length 9in then the wire is bent and reshaped into a squar
    9·1 answer
  • Someone help me I will make you brain
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!