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Ksivusya [100]
3 years ago
15

A hospital director is told that 54% of the emergency room visitors are insured. The director wants to test the claim that the p

ercentage of insured patients is under the expected percentage. A sample of 120 patients found that 60 were insured. Find the value of the test statistic. Round your answer to two decimal places.
Mathematics
1 answer:
Akimi4 [234]3 years ago
6 0

Answer:

Z -0.879173965

Step-by-step explanation:

Z -0.879173965

ρ  0.5

π 0.54

n 120

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Segment LM is the mid-segment of trapezoid a b c d. Ab = 38 and cd = 78. what is lm?
Minchanka [31]

Answer:

58

Step-by-step explanation:

The midsegment has a length that is the average of the lengths of the parallel sides it is halfway between.

... LM = (38 +78)/2 = 116/2 = 58

8 0
3 years ago
What is the value of the expression 2^2+4^2 divided by 2^2
N76 [4]

Use PEMDAS:

Parentheses

Exponents

Multiply and Divide from left to right.

Add and Subtract from left to right.

-------------------------------------------------------

Evaluate the exponents.

2^2+4^2/2^2

Divide from left to right.

4 + 16/4

Add from left to right.

4 + 4

Solution.

8

5 0
3 years ago
Solve system of equations for x + y: 3x + 2y = -18 & 2x + 9y =-12
blondinia [14]

Answer:

(- 6, 0 )

Step-by-step explanation:

Given the 2 equations

3x + 2y = - 18 → (1)

2x + 9y = - 12 → (2)

Multiplying (1) by 2 and (2) by - 3 and adding will eliminate the term in x, that is

6x + 4y = - 36 → (3)

- 6x - 27y = 36 → (4)

Add (3) and (4) term by term to eliminate x

- 23y = 0

y = 0

Substitute y = 0 into either of the 2 equations and evaluate for x

Substituting into (1)

3x + 0 = - 18

3x = - 18 ( divide both sides by 3 )

x = - 6

Solution is (- 6, 0 )

3 0
3 years ago
The graph shows the volume of ice cubes versus temperature in degrees
drek231 [11]

Answer:

A. The data show a negative linear relationship.

Step-by-step explanation:

According to the attached image as we can see that the temperature is in Y axis and volume of ice cubes is in X axis

So the following statements considered to be true

a. The volume represents the explanatory variable

b. Temperature would be strongly correlated to the ice cubes volume

c. As the correlation coefficient is near to -1

But it does not show the negative linear relationship

Therefore the correct option is a.

7 0
3 years ago
Shania is planning a party at her home. She has made 126 chocolate truffles and 84 caramel truffles to give to her guests. If th
vodomira [7]
This turns out to be a division problem. To find how many each person can get, you must divide the amount of food by how many guests.
126 divided by 21 is 6
84 divided by 21 is  4
Each guest will get 6 chocolate truffles and 4 caramel truffles.
5 0
3 years ago
Read 2 more answers
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