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professor190 [17]
4 years ago
6

A 90% confidence interval for a proportion is found to be (0.62, 0.68). What is the sample proportion?

Mathematics
2 answers:
baherus [9]4 years ago
4 0

Answer:B. 0.65

Step-by-step explanation:

Ludmilka [50]4 years ago
3 0

Answer:

B. 0.65

Step-by-step explanation:

Sample proportion is the point estimate of the population proportion which is at the centre of the interval

(0.62+0.68)/2

1.30/2

0.65

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11111nata11111 [884]

Answer:

B. x < 5

Step-by-step explanation:

Lets go first with 3x – 8 < 23  then with - 4x + 26 > 6 and after that we put them together. (I will use the < > signs but as I see on the pictures these include the =, being less and greater OR equal).

3x – 8 < 23

Lets sum 8 in both sides:

3x < 23 +8

3x < 31

Now, divide both sides by 3:

3x/3 < 31/3

x < 31/3

Here we found one condition. Lets go with the other inequality for the other condition:

- 4x + 26 > 6

Lest sum 4x in both sides to get a potive x:

- 4x + 26 + 4x > 6 +4x

26 > 6 +4x

Now subtract 6 in both sides

26 - 6 > 6 +4x - 6

20 > 4x

Finally, divide both sides by 4:

20/4 > x or 5 > x (simplifying we get the second)

So, our second condition says that x must be less than 5.

So, putting both conditions together:

x < 5

x < 31/3 = 10.33

So, if x must be less than 5 and less than 10.33, is the same that saying that x mus be less than 5. We con obviate the condition that x must be less than 10.33 as it is included in the other. So our answer is:

x < 5

It is the option B in the image (remember I didnt use the less or equal sign because you didn't included it in the statement).

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Answer:

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Step-by-step explanation:

You can also write it as 45+28.

In English, a double negative is when two negative words are used in the same sentence.

A double negative in Math is when you have a scenario like this. For example, 1-(-1) is also equal to 1+1.

So 45+28 is 73.

Hope it helps!

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Answer:

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Step-by-step explanation:

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