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2 years ago

Someone please help me! GIVING BRAINLIST TO FIRST RIGHT ANSWER

Mathematics

1 answer:

grin007 [14]2 years ago

5 0

Answer:

A. The mean is increased by 3

Step-by-step explanation:

2 + 9 + 11 + 10 + 3 + 5 + 4 + 12 = 56/8 = 7

2 + 9 + 11 + 10 + 3 + 5 + 4 + 12 + 34 = 90/9 = 10

10 - 7 = 3

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TVs are measured by

kondor19780726 [428]

Answer:

Step-by-step explanation:

Diagonal is 60 inches, height is 24 inches so

60^2 = 24^2 + width^2

6.25 inches

4 0

2 years ago

A 16- foot board is to be cut into two pieces so that one piece is 4 feet longer the the other. How long will the longer piece b

Dennis_Churaev [7]

Answer:

The longer piece will be 10 feet long.

Step-by-step explanation:

16 - 10 is 6

10 is 4 more than 6

therefore the longer piece will be 10 feet long

5 0

3 years ago

Is 4/5 and 7/8 equivalent

denis-greek [22]

No they are not equivalent

5 0

2 years ago

Read 2 more answers

Please HELP !!!!!!!!!!!!!!! IT IS DUE TODAY :( The circle graph below shows the different ways students get home from Astro-park

Scrat [10]

Answer:

480

Step-by-step explanation:

1200 times 0.4 equals 480

3 0

3 years ago

A random sample of 100 people was taken. Eighty of the people in the sample favored Candidate A. We are interested in determinin

riadik2000 [5.3K]

Answer:

Option b - not significantly greater than 75%.

Step-by-step explanation:

A random sample of 100 people was taken i.e. n=100

Eighty of the people in the sample favored Candidate i.e. x=80

We have used single sample proportion test,

$p=\frac{x}{n}$

$p=\frac{80}{100}$

$p=0.8$

Now we define hypothesis,

Null hypothesis $H_0$ : candidate A is significantly greater than 75%.

Alternative hypothesis $H_1$ : candidate A is not significantly greater than 75%.

Level of significance $\alpha=0.05$

Applying test statistic Z -proportion,

$Z=\frac{\widehat{p}-p_0}{\sqrt{\frac{p_0(1-p_0)}{n}}}$

Where, $\widehat{p}=80\%=0.80$ and $p=75%=0.75$

Substitute the values,

$Z=\frac{0.80-0.75}{\sqrt{\frac{0.75(1-0.75)}{100}}}$

$Z=\frac{0.80-0.75}{\sqrt{\frac{0.1875}{100}}}$

$Z=\frac{0.05}{0.0433}$

$Z=1.1547$

The p-value is

$P(Z>1.1547)=1-P(Z$

$P(Z>1.1547)=1-0.8789$

$P(Z>1.1547)=0.1241$

Now, the p-value is greater than the 0.05.

So we fail to reject the null hypothesis and conclude that the A is not significantly greater than 75%.

Therefore, Option b is correct.

7 0

3 years ago