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Tems11 [23]
3 years ago
15

A teacher asks 90 students who drive how many speeding tickets they received in the last year. predict the shape of the distribu

tion and explain. select the correct answer below.
a. the distribution will be​ left-skewed. most people will have at least one​ ticket, but there will be a few people with no tickets.
b. the distribution will be​ left-skewed. most people will have no​ tickets, but there will be a few people with​ 1, 2,​ 3, or more tickets.
c. the distribution will be​ right-skewed. most people will have no​ tickets, but there will be a few people with​ 1, 2,​ 3, or more tickets.
d. the distribution will be roughly symmetric. the number of people who have fewer tickets than the mean and the number of people who have more tickets than the mean is roughly equal.
e. the distribution will be​ right-skewed. most people will have at least one​ ticket, but there will be a few people with no tickets.
Mathematics
1 answer:
CaHeK987 [17]3 years ago
8 0
Primary sources contain information

A. with the advantage of hindsight and the perspective of an outside observer and may be more objective.
B. provided by someone who's been through an event. It's a firsthand account that lends a unique perspective.
C. on statistics gathered after an important historical event.
D. on psychological information gathered from raw data from psychological tests.
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there are 148 juniors and 272 seniors attending prom this year. if there must be three chaperones per 60 students, how many chap
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21 chaperones are needed for 420 students.

Step-by-step explanation:

No. of juniors = 148

No. of seniors = 272

Total = 148+272 = 420 students

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Ratio of chaperon to students = 1:20

Let,

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Ration of chaperones to students = x:420

Using proportion

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1:20::x:420

Product of mean = Product of extreme

20*x=420*1\\20x=420\\

Dividing both sides by 20

\frac{20x}{20}=\frac{420}{20}\\x=21

21 chaperones are needed for 420 students.

Keywords: ratio, proportion

Learn more about ratios at:

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