Why dosent an elephant smoke

b. Find a 99% confidence interval for mean age of ICU patients using the facts that, in the sample, the mean is 57.55 years and

rjkz [21]

Answer:

99% of confidence intervals for mean age of ICU patients

(53.8920 , 61.2079)

Step-by-step explanation:

Explanation:-

Given sample mean $x^{-} = 57.55$

Given standard error is determined by

S.E = $\frac{S.D}{\sqrt{n} }$

Given data standard error = 1.42

99% of confidence intervals for mean is determined by

$(x^{-} - Z_{0.01} \frac{S.D}{\sqrt{n} } , x^{-} + Z_{0.01} \frac{S.D}{\sqrt{n} } )$

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.01}{2} } = Z_{0.05} = 2.576$

$(x^{-} - 2.576 S.E , x^{-} + 2.576 S.E)$

$(57.55 - 2.576X 1.42 , 57.55+ 2.576 X1.42)$

(53.8920 , 61.2079)

Conclusion:-

99% of confidence intervals for mean is determined by

(53.8920 , 61.2079)

5 0

3 years ago

Use the rule to find the image of the vertices ABC is A (-2,4), B(5,3), C(1,-6) for the translation. (3 points)

yarga [219]

Answer:

A'(-5, 6), B'(2, 5), C'(-2, -4). The image is 3 units left and 2 units up from the original.

Step-by-step explanation:

Substitute x and y into the rule to find the image coordinates.

... A: (-2-3, 4+2) = A'(-5, 6)

... B: (5-3, 3+2) = B'(2, 5)

... C: (1-3, -6+2) = C'(-2, -4)

The translation x⇒ x-3 means the point is moved 3 units to the left (in the -x direction).

The tranlation y ⇒ y+2 means the point is moved 2 units up (in the +y direction).

5 0

3 years ago

Read 2 more answers

Complete the steps to solve the inequality: 0.2(x + 20) – 3 > –7 – 6.2x Use the distributive property: Combine like terms: Us

IRISSAK [1]

0.2(x + 20) - 3 > -7 - 6.2x.....distribute trhr the parenthesis
0.2x + 4 - 3 > -7 - 6.2x...simplify
0.2x + 1 > - 7 - 6.2x...addition property...add 6.2x to both sides
0.2x + 6.2x + 1 > -7 ...simplify
6.4x + 1 > - 7.....subtraction property....subtract 1 from both sides
6.4x > -7 - 1....simplify
6.4x > -8....division property....divide both sides by 6.4
x > -8 / 6.4...simplify
x > - 1.25 <==

3 0

3 years ago

Read 2 more answers

Write the number that matches the clues

bagirrra123 [75]

I think the number is 290.
*There's 2 hundreds
*9 is 9 more than 0

4 0

3 years ago

I need help on the second one

Nady [450]

Answer:

See explanation