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mihalych1998 [28]
2 years ago
12

A researcher uses an anonymous survey to investigate the firearms training of American police officers. Based on the set of 56 s

urveys that were completed and returned, the researcher finds that these police officers spend an average of 4.1 hours each month for firearms training.
1. For this study, the set of 56 police officers who returned surveys is an example of a(n) ___________.
Options:
A) parameter
B) statistic
C) population
D) sample
Mathematics
1 answer:
olganol [36]2 years ago
5 0

Answer:(A) Population

It is telling you the exact amount of officers so I would think it would be (A)

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The word geometry has eight letters. three letters are chosen at random. what is the probability that two consonants and one vow
olga nikolaevna [1]

Answer:

0.536 is the required probability.

Step-by-step explanation:

 We have been given the word the word "GEOMETRY"

we have to find the probability that two consonants and one vowel are chosen:

Number of consonants are: 5

Number of  vowels are: 3

Hence, The required probability is: \frac{^5C_2\cdot ^3C_1}{^8C_3}

Using: ^nC_r=\frac{n!}{(r!)(n-r)!}

\frac{\frac{5!}{3!\cdot 2!}\cdot\frac{3!}{1!\cdot 2!}}{\frac{8!}{3!\cdot 5!}}

Simplifying the above expression:

\frac{\frac{5\cdot 4\cdot 3!}{3!\cdot 2}\cdot {\frac{3\cdot 2!}{2!}}}{\frac{8\cdot 7\cdot 6\cdot 5!}{5!\cdot 3\cdot 2}}

Further simplification after cancelling out the common terms we get:

\Rightarrow \frac{30}{56}=\frac{15}{28}=0.5357=0.536

Hence, Option 1 is correct.


4 0
2 years ago
Read 2 more answers
12. Venu and Tanuj are running along a circular track. They take 48 seconds and 56 seconds to
brilliants [131]

Answer:

The meet at first time at starting point after 336 seconds,

Vanu have completed 7 laps while Tanuj has completed 6 laps.

Step-by-step explanation:

Given that Venu and Tanuj take 48 seconds and 56 seconds to

complete a lap respectively.

To meet them again at the startiong point, the  time taken must be multiple of 56 and 48.

So, the minimum time required to meet them again at the startiong point is time taken for first time meet.

Time taken to first time meet is the smallest number which can be divided by 56 and 48, i.e the lowest common factor (LCM) of 56 and 48 which is 336 seconds or 5 minutes 36 seconds.

Number of laps by Venu

=\frac{336}{48}=7

Number of laps by Tanuj

=\frac{336}{56}=6

8 0
2 years ago
Draw a diagram that shows 1/5 times 30 equals 6. Please include a diagram
kobusy [5.1K]
The diagram included should explain this.

4 0
2 years ago
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Aslam Farid and majid are going to buy a shop that costs 54 million rupees .if Aslam pays 5 million rupees more than Farid and F
blagie [28]

Answer:

17million

Step-by-step explanation:

5+(2m)+m+2+m=54

9+3m=54

3m=45

m=15

Farid=15+2=17

3 0
2 years ago
9,290 is the value of the first 9 ten times as great as the value of the second 9?
Semenov [28]

Answer:

No

Step-by-step explanation:

The first nine in on the place of the thousands, while the second nine is on the place of the tens. so the first nine is a hundred times as great as the second nine

8 0
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