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2 years ago

Find x Please Help Thank You

Mathematics

1 answer:

Marat540 [252]2 years ago

7 0

uhhhhhhhhhhhhhhhhh i have no clue so sorry

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A survey of 100 similar-sized hospitals revealed a mean daily census in the pediatrics service of 27 with a standard deviation o

Vinil7 [7]

Answer:

We conclude that the mean is greater than 25.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 25

Sample mean, $\bar{x}$ = 27

Sample size, n = 100

Alpha, α = 0.05

Sample standard deviation, s = 6.5

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 25\\H_A: \mu> 25$

We use One-tailed(right) z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{27 - 25}{\frac{6.5}{\sqrt{100}} } = 3.07$

Now, $z_{critical} \text{ at 0.05 level of significance } = 1.645$

Since,

$z_{stat} > z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis.

Thus, the mean is greater than 25.

3 0

3 years ago

Write an equation for the translation of y = |x|.

allochka39001 [22]

Answer:

y = |x + 6|

Step-by-step explanation:

You can check by graphing y = |x + 6|

4 0

3 years ago

2. G(x) = 2x² + 3x<br>Is the function even, odd, or neither?

Bingel [31]

The function appears to be neither odd nor even

8 0

3 years ago

PLZ HURRY i need this for test if you have the answers for all questions plz put the test is for plato algebra A1 unit3 post tes

elena-14-01-66 [18.8K]

Explanation is in the file

tinyurl.com/wpazsebu

7 0

3 years ago

Which of the following points is the solution of the quadratic equation:3x^2-5x-2=0

Maslowich

Answer:

x1 = 2

x2 = -1/3

Step-by-step explanation:

3x^2-5x-2=0

D=25-4*(-2)*3 = 25 + 24 = 49 --> sqrt 49 = 7

x1 = 5 + 7 / 2*3 = 2

x2 = 5 - 7 / 2*3 = -1/3

7 0

2 years ago