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
Darya [45]
3 years ago
9

Which statement is correct?

Mathematics
1 answer:
Helga [31]3 years ago
3 0

Answer:

the horizontal is correct

Step-by-step explanation:

<em>the</em><em> </em><em>reason</em><em> </em><em>that</em><em> </em><em>is</em><em> </em><em>is</em><em> </em><em>bec</em><em>ause</em><em> </em><em>a</em><em> </em><em>hori</em><em>zontal</em><em> </em><em>lines</em><em> </em><em>goes </em><em>up</em><em> </em><em>and</em><em> </em><em>down </em><em>which</em><em> </em><em>has</em><em> </em><em>a</em><em> </em><em>no</em><em> </em><em>slope</em><em> </em><em>at</em><em> </em><em>all</em><em> </em><em>it's </em><em>almost</em><em> </em><em>like</em><em> </em><em>a</em><em> </em><em>wall</em><em>.</em><em> </em>

You might be interested in
What is the answer to this please
Alex_Xolod [135]
Domain: x≤5 (notice the closed dot on the right and the arrow on the left)
Range: y≤2 (notice the closed dot on the right and the arrow on the left)

The arrow means it keeps going infinitely. The closed dot means it stops there but is inclusive of that value.
3 0
3 years ago
Dual-energy X-ray absorptiometry (DXA) is a technique for measuring bone health. One of the most common measures is total body b
sesenic [268]

Answer:

\bar d=\frac{\sum_{i=1}^n d_i}{n}=-0.001

s=\sqrt{\frac{\sum_{i=1}^n (x_i -\bar X)^2}{n-1}}=0.0095

-The sample is too small to make judgments about skewness or symmetry.

H0:\mu_{1}=\mu_{2}

H1:\mu_{1} \neq \mu_{2}

t=\frac{1.173-1.174}{\sqrt{\frac{0.1506^2}{8}+\frac{0.1495^2}{8}}}=-0.013

p_v =2*P(t_{(14)}

So the p value is a very high 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 a we don't have a significant difference between the two means.

Step-by-step explanation:

First we need to find the difference defined as:

(Operator 1 minus Operator 2)

d1=1.326-1.323=0.003      d2=1.337-1.322=0.015

d3=1.079-1.073=0.006     d4=1.229-1.233=-0.004

d5=0.936-0.934=0.002   d6=1.009-1.019=-0.01

d7=1.179-1.184=-0.005      d8=1.289-1.304=-0.015

Now we can calculate the mean of differences given by:

\bar d=\frac{\sum_{i=1}^n d_i}{n}=-0.001

And for the sample deviation we can use the following formula:

s=\sqrt{\frac{\sum_{i=1}^n (x_i -\bar X)^2}{n-1}}=0.0095

Describe the distribution of these differences using words. (which one is correct)

We can plot the distribution of the differences with the folowing code in R

differences<-c(0.003,0.015,0.006,-0.004,0.002,-0.01,-0.005,-0.015)

hist(differences)

And we got the image attached. And we can see that the distribution is right skewed but we don't have anough info to provide a conclusion with just 8 differnences.

-The sample is too small to make judgments about skewness or symmetry.

Use a significance test to examine the null hypothesis that the two operators have the same mean. Give the test statistic. (Round your answer to three decimal places.)

\bar X_{1}=1.173 represent the mean for the operator 1

\bar X_{2}=1.174 represent the mean for the operator 2

s_{1}=0.1506 represent the sample standard deviation for the operator 1

s_{2}=0.1495 represent the sample standard deviation for the operator 2

n_{1}=8 sample size for the operator 1

n_{2}=8 sample size for the operator 2

t would represent the statistic (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to check if the means for the two groups are the same, the system of hypothesis would be:

H0:\mu_{1}=\mu_{2}

H1:\mu_{1} \neq \mu_{2}

If we analyze the size for the samples both are less than 30 so for this case is better apply a t test to compare means, and the statistic is given by:

t=\frac{\bar X_{1}-\bar X_{2}}{\sqrt{\frac{s^2_{1}}{n_{1}}+\frac{s^2_{2}}{n_{2}}}} (1)

t-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

Calculate the statistic

We can replace in formula (1) like this:

t=\frac{1.173-1.174}{\sqrt{\frac{0.1506^2}{8}+\frac{0.1495^2}{8}}}=-0.013

Statistical decision

For this case we don't have a significance level provided \alpha, but we can calculate the p value for this test. The first step is calculate the degrees of freedom, on this case:

df=n_{1}+n_{2}-2=8+8-2=14

Since is a bilateral test the p value would be:

p_v =2*P(t_{(14)}

So the p value is a very high 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 a we don't have a significant difference between the two means.

8 0
3 years ago
If 4 workers take 900 hours to finish a project, how long will it take 8 workers to complete the same project?
butalik [34]

Answer: 350

Step-by-step explanation: If you multiply the amount of <em>workers</em> by two, then you divide the amount of <em>time </em>by two, and vice versa. So, in other words, whatever number you multiply the workers by, divide the time by that same number. I hope this helps!

6 0
2 years ago
A man has mislaid his wallet. He thinks there is a 0.4 chance that the wallet is somewhere in his bedroom, a 0.1 chance it is in
lana [24]

Answer:

a. Probability = 0.15

b. Probability = 0.3

Step-by-step explanation:

Given

P(Bedroom) = 0.4

P(Kitchen) = 0.1

P(Bathroom) = 0.2

P(Living\ room) = 0.15

Solving (a): Probability of being somewhere else

This is calculated by subtracting the sum of given probabilities from 1.

Probability = 1 - (0.4 + 0.1 + 0.2 + 0.15)

Probability = 1 - 0.85

Probability = 0.15

Solving (b): Probability of being in bedroom or kitchen

This is calculated as:

Probability = P(Bedroom) + P(Kitchen)

Probability = 0.2 + 0.1

Probability = 0.3

6 0
3 years ago
At 3:25 p.m., a passenger train and a freight train both left Kalamazoo,
Svetlanka [38]

Answer:

4:10 PM

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • Real quick question. need help plz
    10·2 answers
  • What is b. If the number as a fraction is 56/90.
    14·1 answer
  • 17x25i don't know how to do this
    12·2 answers
  • WILL GIVE BRAINLIEST easy vocab!!!
    10·1 answer
  • ⟟⏁⋉⟒⟒⋔⍜⊑⍀⏃⏁⏃⌿⏃⍀⏃⟒⎅⍜⍀⟟⋔⟒⏃⋔⎍⋔⎍⏃⋔⟒⋏⍜⍀⏃⏁⟒⎅⏃⟒⌰⏃⏁⟒⟒⎅⏃⟒⋔⍜⟒⎅⍜⍀⟟⋔⟒⏃⋔⟒⋏⍜⍜⌰⋔⟒⋏⏃⎅⟒⌿⏃⎅⏃⍀⟟⏃⋔⟒⋏⍜ ⎅⟟⋔⟒⎅⏃ ​
    11·1 answer
  • 10 ft area of base 62ft 2 (squared)
    13·1 answer
  • 7a = 28 Is a=21 a solution?<br><br> yes or no
    7·2 answers
  • Which number is greater? 3√35​ √8
    12·2 answers
  • 1. A linear function can be represented by the equation y = 7x - 4. Identify the slope and y-intercept.
    5·2 answers
  • G wants to get over 9000 comments on his videos. He gets the same number of comments for each cat video that he uploads, and he
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!