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DochEvi [55]
4 years ago
13

Which option identifies the sampling technique represented in the following scenario? An ophthalmologist wishes to measure the r

ate of occurrence of glaucoma in patients that come to her eye clinic. Each patient is assigned a number from 1 to 1,040. A random number generator is used to select a starting number. The selected number is 8. Every tenth patient is then evaluated for glaucoma. In other words, patients 8, 18, 28, 38, 48, 58, 68, etc. were selected to complete the survey.
A. cluster sampling
B. stratified random sampling
C. systematic random sampling
D. mixed/multi-stage random sampling
Mathematics
1 answer:
Zielflug [23.3K]4 years ago
7 0
The answer is C. Systemic random sampling.

By definition, systemic random sampling is a sampling technique where the respondents are selected according to a <em>random starting point </em>(this alone shows that the answer is C.) The researcher then chooses the sample interval, which is the difference between two consecutive  numbers in the progression. 

In this case, the starting point is 8 and the sample interval is 10.

The answer is C. 
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A shoe store costs 1800 dollars a month to operate. The average wholesale cost of each pair of shoes is 25 dollars, and the aver
likoan [24]

Answer: 45

Step-by-step explanation:

The store has to sell  

45

pairs of shoes.

Explanation:

The store has a base cost of  

$

1800

, the cost per pair of shoes is  

$

25

. Each pair of shoes is sold for  

$

65

, therefore the profit per pair of shoes is

$

65

−

$

25

=

$

40

The formula for calculating the amount that needs to be sold would look like this;

40

x

=

1800

To determine the value of  

x

, we take this formula;

x

=

1800

40

x

=

45

Therefore, the store needs to sell  

45

pairs of shoes to break even.

3 0
3 years ago
If f(x) = 3 – 2x and 1/x+5, what is the value of (f/g)(8)? –169 –1 13 104
Basile [38]
I'm assuming that this is the complete question.
If f(x) = 3 – 2x and g(x)=1/(x+5), what is the value of (f/g)(8)? a) –169       b) –1      c) 13     d) 104
x = 8
f(x) = 3 -2xf(8) = 3 - 2(8) = 3 - 16 = -13
g(x) = 1/(x+5)g(8) = 1/(8+5) = 1/13
(f/g)(8)f(8)/g(8) = -13/ (1/13) = -13 * 13 = -169  Choice A :)
8 0
4 years ago
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A pair of jeans cost $40. They are on sale 20% off. How much will you save?
Ilya [14]

$8.00 is how much you will save

8 0
3 years ago
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What is the greatest common factor of the polynomial's terms?
Alinara [238K]

Step-by-step explanation:

Write the prime factorization of each term:

9r⁵s = 3² × r⁵ × s

6r⁴s² = 2 × 3 × r⁴ × s²

12r²s = 2² × 3 × r² × s

The greatest common factor will have all the common factors raised to their lowest exponent.

So all three terms have 3, r, and s as factors.  The lowest exponent of 3 is 1.  The lowest exponent of r is 2.  The lowest exponent of s is 1.

GCF = 3 × r² × s

GCF = 3r²s

Factor out the GCF:

9r⁵s + 6r⁴s² − 12r²s

3r²s (3r³ + 2r²s − 4)

4 0
3 years ago
A scale for a scale drawing is 12 cm:1 mm. which is larger the actual object or the scale drawing?
garri49 [273]

Answer:

scale drawing

Step-by-step explanation:

hope it helps :)

6 0
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