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Slav-nsk [51]
3 years ago
14

A sociologist recently conducted a survey of senior citizens who have net worths too high to qualify for Medicaid but have no pr

ivate health insurance. The ages of the 25 uninsured senior citizens were as follows:
69 74 75 62 70 93 64 69 61 88 67 77 87 90 66 91 77 63 82 82 71 74 76 65 83


(a) Find the standard devation of the observations.


A. 74


B. 75.04


C. 94.95


D. 9.74


(b) Find the median of the observations. ト


A. 77


B. 74


C. 67.2


D. 83
Mathematics
1 answer:
hjlf3 years ago
6 0

Answer:

a) s= 9.74

D. 9.74

b) Median= 74

B. 74

Step-by-step explanation:

Part a

We have the following dataset given:

69 74 75 62 70 93 64 69 61 88 67 77 87 90 66 91 77 63 82 82 71 74 76 65 83

We can begin calculating the sample mean with the following formula:

\bar X = \frac{\sum_{i=1}^n X_i}{n}

And replacing we got:

\bar X = 75.04

Now we can calculate the sample deviation with the following formula:

s =\sqrt{\frac{\sum_{i=1}^n (X_i-\bar X)^2}{n-1}}

And after replace we got:

s= 9.74

Part b

For this case we need to sort the value on increasing way:

[1] 61 62 63 64 65 66 67 69 69 70 71 74 74 75 76 77 77 82 82 83 87 88 90 91 93

And the median would be the value in the position 13 and we got:

Median= 74

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The temperature was 75 degrees. at noon, the temperature increased by 7. by evening the temperature decreased by 7
DIA [1.3K]

Answer:

75

Step-by-step explanation:

75 + 7 = 82


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6 0
1 year ago
Can someone help me simplify these expressions
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Answer:

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Step-by-step explanation:

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8 0
3 years ago
Dion has a pizza with a diameter of 10 1/3 inch is the square box shown big enough to fit the pizza inside justify your answer
I am Lyosha [343]

Given :

Diameter of pizza , D=10\dfrac{1}{3}=\dfrac{31}{3} .

To Find :

Is square box of size equal to diameter big enough to fit pizza inside it .

Solution :

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Area of square with side equal to diameter :

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Since , the area of square is more than area of pizza .

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maks197457 [2]
Remember that transformation between Cartesian and polar system are:
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3 years ago
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