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
AlexFokin [52]
2 years ago
15

CAN SOMEONE PLEASE HELP ME WITH MY MATH QUESTION

Mathematics
1 answer:
egoroff_w [7]2 years ago
5 0

Answer:

number 3

Step-by-step explanatio

.

You might be interested in
Draw a model to show 5.5/5
REY [17]
I don't understand the question you are asking sorry.
7 0
2 years ago
Graph on a coordinate plane each set of (x, y) values. Which set of values describes two quantities that are in a proportional r
natita [175]

Answer:

C

Step-by-step explanation:

4 : 9

2 : 4.5

y = kx

y = 2.25x

4 0
3 years ago
PLZ HELP ME FIGURE THIS OUT
Romashka [77]

Answer:

f=2

Step-by-step explanation:

3=9-3f

3-9=-3f

-6=-3f

2=f

f=2

5 0
3 years ago
We have 2.8 meters of rope. how many centimeters is that ?
Naily [24]
Centi- means "hundred". There are 100 centimeters in 1 meter. 
2.8m•100cm=280cm
8 0
3 years ago
Let n1equals50​, Upper X 1equals30​, n2equals50​, and Upper X 2equals10. Complete parts​ (a) and​ (b) below. a. At the 0.05 leve
Viefleur [7K]

Answer:

Null hypothesis:p_{1} = p_{2}  

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

z=\frac{0.6-0.2}{\sqrt{0.4(1-0.4)(\frac{1}{50}+\frac{1}{50})}}=4.082    

p_v =2*P(Z>4.082)=4.46x10^{-5}  

So the p value is a very low value and using any significance level for example \alpha=0.05 always p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can say the the proportion 1 is significantly different from proportion 2.

Step-by-step explanation:

1) Data given and notation  

X_{1}=30 represent the number of people with a characteristic in 1

X_{2}=10 represent the number of people with a characteristic in 2

n_{1}=50 sample of 1 selected  

n_{2}=50 sample of 2 selected  

p_{1}=\frac{30}{50}=0.6 represent the proportion of people with a characteristic in 1

p_{2}=\frac{10}{50}=0.2 represent the proportion of people with a characteristic in 2

z would represent the statistic (variable of interest)  

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

2) Concepts and formulas to use  

We need to conduct a hypothesis in order to check if the proportion 1 is different from proportion 2 , 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{30+10}{50+50}=0.4  

3) Calculate the statistic  

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

z=\frac{0.6-0.2}{\sqrt{0.4(1-0.4)(\frac{1}{50}+\frac{1}{50})}}=4.082    

4) 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>4.082)=4.46x10^{-5}  

So the p value is a very low value and using any significance level for example \alpha=0.05 always p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can say the the proportion 1 is significantly different from proportion 2.  

3 0
3 years ago
Other questions:
  • What is the vertex of the graph of y=3(x-1)2+2
    6·2 answers
  • Write an equation for a polynomial function whose graph intercepts the
    11·1 answer
  • The quotient of the square of a number n and the cube of n increased by 5.
    14·2 answers
  • Solve the equation 3x+5y=15 for y
    6·1 answer
  • Math help please<br><br> What is the value for y?
    8·1 answer
  • Solve for x 5/4=x/12
    13·2 answers
  • The following line segments are graphed.
    7·1 answer
  • PLEASE I WILL GIVE BRAINLIEST AND I WIL REPORT ANSWERS THAT HAVE NOTHING RI DO WITH MATH THANKS ​
    9·1 answer
  • If using the method of completing the square to solve the quadratic equation
    6·1 answer
  • Which expression is equivalent to
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!