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azamat
3 years ago
14

In order to study the shoe sales of people in his store, Billy samples the population by dividing the customers by age and rando

mly selecting a proportionate number of customers from each age group. Which type of sampling is used?
Mathematics
1 answer:
just olya [345]3 years ago
7 0

Answer:

The type of sampling method used is Stratified Sampling: Stratified Sampling is where the population has a number of distinct categories (different age groups in Billy's case). Here, the sampling frame can be organised into separate categories( age groups) which is called 'strata'. Each stratum is then sampled as an independent sub-population out of which individual elements can be randomly selected. In this case, each element in a group has a chance of being selected. With Stratified sampling, the best survey result occurs when elements within the strata are internally homogeneous ( in this case, the customers from each age group are selected).

Step-by-step explanation:

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For circle C, CG = CE, CG is perpendicular to FB, and CE is perpendicular to DA. What conclusion can be made? a circle with cent
svetlana [45]

Answer:

A circle with center C has chords FB and DA which are equidistant from C.

Step-by-step explanation:

A chord is a straight line drawn from a point on the circumference of a circle to another point on the circumference, without passing through the center of the circle.

From the given question, a circle center C has two chords FB and DA that are equidistant from the center of the circle. The distant of FB from C is CG and the distance of DA from C is CE. But CG = CE, which implies that the two chords have equal distant from the center of the circle.

Therefore line CG from center C intersects FB at G, and line CE from center C intersects DA at E.

8 0
3 years ago
19. What is the probability that the student only plays football?
Nikolay [14]

Using the probability concept, we have that:

  • The probability that the student only plays football is: (c) 13 /33.
  • The probability that the student plays baseball, but not football is: (d) 8/33.

<h3>What is a probability?</h3>

A probability is given by the <u>number of desired outcomes divided by the number of total outcomes</u>.

The total number of students is given by:

26 + 3 + 9 + 10 + 6 + 5 + 7 = 66

Of those, 26 play only football, hence the probability is:

p = 26/66 = 13/33

Which means that option c is correct for question 19.

Of those same 66 students, 9 + 7 = 16 play baseball but not football, hence the probability is:

p = 16/66 = 8/33

Which means that option d is correct for question 20.

More can be learned about probabilities at brainly.com/question/14398287

#SPJ1

8 0
2 years ago
Simplify 3√125. Thanks!
ivann1987 [24]
If you mean
3 times square root of 125 then go to AAA
if you mean ∛125 then go to BBBB


AAAAAA
3 times √125=3 times 5√5=15√5

BBBBBBB
∛125=5 or -5
5 0
4 years ago
Read 2 more answers
You enter an elevator on the ground floor, which is labeled 0. You get off on the floor labeled +4. What is your location?
Rzqust [24]
A. 4 floors above the ground floor.

3 0
3 years ago
in order to write an equation to solve a problem, identify the unknown for which you are looking and assign a(n) number to it. T
KatRina [158]
False, you assign a variable to it, such as "x", because it's an unknown quantity.
4 0
3 years ago
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