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2 years ago

In 2014, the Centers for Disease Control and Prevention reported the average human life span in the United States as

Mathematics

1 answer:

kakasveta [241]2 years ago

7 0

Answer:

7.8

Step-by-step explanation:

subtract 85 - 77.2

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Researchers are studying the distribution of subscribers to a certain streaming service in different populations. From a random

Katen [24]

Answer:

$CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}$

Step-by-step explanation:

Given

$n = 200$

$x_1 = 34$ -- City C

$x_2 = 54$ --- City K

Required

Determine the 90% confidence interval

This is calculated using:

$CI = \bar x \± z\frac{\sigma}{\sqrt n}$

Calculating $\bar x$

$\bar x = \bar x_1 - \bar x_2$

$\bar x = \frac{x_1}{n} - \frac{x_2}{n}$

$\bar x = \frac{34}{200} - \frac{54}{200}$

$\bar x = 0.17 - 0.27$

For a 90% confidence level, the z-score is 1.65. So:

$z = 1.65$

Calculating the standard deviation $\sigma$

$\sigma = \sqrt{(\bar x_1)*(1 - \bar x_1) + (\bar x_2)*(1 - \bar x_2) }$

So:

$\sigma = \sqrt{(0.17)*(1 - 0.17) + (0.27)*(1 - 0.27) }$

$\sigma = \sqrt{(0.17)*(0.83) + (0.27)*(0.73)}$

So:

$CI = (0.17 - 0.27)\± 1.65\frac{\sqrt{(0.17)*(0.83) + (0.27)*(0.73)}}{\sqrt {200}}$

$CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}$

7 0

3 years ago

Please help me ASAP..

Triss [41]

Answer:

x = -8

Step-by-step explanation:

5(x - 1) = -45

5x - 5 = -45

add 5 to each side of the equation:

5x = -40

divide both sides by 5:

x = -8

8 0

3 years ago

Help !!!!!! Need to know ASAP

madreJ [45]

Answer:

Multiply by 5

5*2f-5*6g=10f-30g

5 0

3 years ago

Please show work thank you

sasho [114]

3 x3 = 9 4 x 3 =12 6 x 2 = 18 3 x

6 0

3 years ago

PLEASE SHOW FULL SOLUTIONS!!! WILL MARK BRAINLIEST FOR BEST ANSWER!!

kirill [66]

Answer:

We would use the explicit formula

Step-by-step explanation:

<u>The recursive formula is good to find the next term, example:</u>

a₁ = 20
aₙ = aₙ₋₁ + 10

<u>You would need the explicit formula to find any term, example:</u>

aₙ = 20 + 10(n - 1)

4 0

3 years ago