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4 years ago

Please help its due today :)))

Mathematics

1 answer:

Iteru [2.4K]4 years ago

3 0

Answer:

x and y have a weak, negative correlation

Step-by-step explanation:

the reason that is, is because since the points aren't in a approximate line it is considered weak. Since the line is going from left to right it is considered negative. (hope this helped :)

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In a simple random sample of 1000 Americans, it was found that 61% were satisfied with the service provided by the dealer from w

BlackZzzverrR [31]

Answer:

c. smaller for the sample of Canadians, since the percentage satisfied was smaller than that for the Americans.

Correct we see that the proportion of Canadians is lower than the proportion of Americans since 0.58<0.61. And the reason why is by the percentage.

Step-by-step explanation:

Data given and notation

$X_{A}=610$ represent the number of people of America satisfied

$X_{C}=580$ represent the number of people of Canada satisfied

$n_{A}=1000$ sample of Americans selected

$n_{C}=1000$ sample of Canadians selected

$p_{A}=\frac{610}{1000}=0.61$ represent the proportion of American people satisifed

$p_{C}=\frac{580}{1000}=0.58$ represent the proportion of Canadians satisfied

$\hat p$ represent the pooled estimate of p

Solution to the problem

If we analyze one by one the optiosn we have this:

a. larger for the Canadians because the sample size is smaller.

False, both have the same the same sample size of 1000 and the proportion of Canadians is less than the proportion of Americans.

b. smaller for the sample of Canadians, since the population of Canada is less than half that of the United States. Hence, the sample is a larger proportion of the population.

False, the proportion of Canada is not less than half of the United States since the difference is just 0.61-0.58=0.03

c. smaller for the sample of Canadians, since the percentage satisfied was smaller than that for the Americans.

Correct we see that the proportion of Canadians is lower than the proportion of Americans since 0.58<0.61. And the reason why is by the percentage.

d. larger for the Canadians, since Canadian citizens are more widely dispersed throughout their country than American citizens are in the United States. Hence, Canadians have more variable views.

False the porportion of Canadians 0.58 is NOT higher than the proportion of Americans satisfied 0.61 since 0.58 is not less than 0.61.

5 0

3 years ago

Read 2 more answers

I WILL MARK BRAINLIST <br> HELP ASAP ITS DUE

fomenos

Answer:

Since 1 in : 4 yd i just multiply 12 by 4 so I get 48 so 48 square yards is your answer

6 0

3 years ago

Can you find the<br> triangle's perimeter<br><br> I’m marking branliest

navik [9.2K]

Answer:

x + 6 = 6×

3× + 2 = 5×

2× + 4 = 6×

6× + 6× + 5×

12× + 5×

17×

7 0

3 years ago

The 10 students on the swim team want to raise $185.50 to buy uniforms. They have already raised $60.00. If each student raises

Ahat [919]

Answer:

785.50

Step-by-step explanation:

10x60=600+185.50+785.50 hope i helped

5 0

3 years ago

Read 2 more answers

Write an equation for an ellipse centered at the orgin, which has foci ( plus minus 3, 0) and co-vertices at (0, plus minus 4)

Vadim26 [7]

Answer:

The answer is below

Step-by-step explanation:

The co-vertices of an ellipse are the endpoints of the minor axis. The equation for an ellipse is given by:

$\frac{(x-h)^2}{a^2} +\frac{(y-k)^2}{b^2}=1$

Where (h, k) is the center of the ellipse, (h, k±b) is the co-vertices, (h ± a, k) is the vertices, (h ± c, k) is the foci and c² = a² - b²

Since the center is the origin, hence (h, k) = (0, 0). i.e h = 0, k = 0.

Foci = (h ± c, k) = (± c, 0) = (±3, 0). c = 3

co-vertices = (h, k±b) = (0, ±b) = (0, ±4). b = 4

c² = a² - b²

a² = c² + b²

a² = 3² + 4² = 25

a = 5

Therefore the equation of the ellipse is:

$\frac{x^2}{5^2} +\frac{y^2}{4^2}=1 \\\\\frac{x^2}{25} +\frac{y^2}{16}=1$

6 0

3 years ago