1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nalin [4]
3 years ago
12

2. A teacher asked his class of 20 students, "What is your age? Their responses are shown in the dot plot below.

Mathematics
2 answers:
Karolina [17]3 years ago
8 0

Answer:

Yes, average does represent the centre of this data.

Average = 15.9

Step-by-step explanation:

As this question is not complete and not correctly written. Let's try to find an answer for this question.

Total number of Students = 20 = n

and we are given this data:

14, 15, 17, 18, 16.

which is just five entries and total number of students are 20. 15 entries are missing in this questions. So, let's add our own values into this question.

New set of entries for 20 students.

1. 14

2. 15

3. 17

4. 18

5. 16

6. 19

7. 17

8. 16

9. 17

10. 17

11. 15

12. 20

13. 14

14. 17

15. 18

16. 19

17. 13

18. 20

19. 17

20. 16

So, let's calculate the average of these numbers.

Average = Sum of all entries/ Total number of entries.

Average = 318/20

Average = 15.9

So, the average age of all the students of class is 15.9.

Let's calculate median:

For median , data must be arranged in a order from least to greatest number. Median is a number from that data which is at half way. In case of odd numbers, it is easy to identify median because there is only one number. and in case of even numbers, median is the average of the two middle numbers. So, here we have even numbers and median is the average of two middle numbers = 17 + 17/2 = 17

Median = 17

Yes, average does represent the centre of this data.

olganol [36]3 years ago
5 0

Answer:

a) Mean = 16.09

Median = 16

Mode is highest frequency = 16

Range = highest number - lowest number

Range = 19 - 14 = 5

b) median

Step-by-step explanation:

The mean = [(4×14) + (5×15) + (6×16) + (3×17) + (4×19)] ÷ 22

Mean = (56+75+96+51+76)/22

Mean = 354/22

Mean = 16.09

Median = 16

Mode is highest frequency = 16

Range = highest number - lowest number

Range = 19 - 14 = 5

Measure of central tendency is a single value that attempts to describe a set of data by identifying the central position within that set of data.

The mean is most likely the measure of central tendency that is very popular with, but in this question, median best represent the center for this data because of its single value.

You might be interested in
"the sum of the digits of a two-digit number is 12. The difference of the digits is 2. find the number if the units digit is lar
Stells [14]

let the number be xy then

x + y = 12

y - x = 2 ( because y > x)

adding we get 2y = 14 so y = 7

and x = 12 - 7 = 5

So the number is 57.

7 0
3 years ago
Football helmets
horsena [70]

Answer:

They can buy 24 helmets.

Step-by-step explanation:

1 helmet = $15

$369 divided by $15 --> 24.6 --> 24 helmets

5 0
3 years ago
two cars leave Memphis from exactly the same spot. one traveling north at 70 mph and the other traveling south at 65 mph. how lo
Gemiola [76]

Answer:

2 hours

Step-by-step explanation:

270 = (70+65) * t

270= 135t

t = 2

8 0
3 years ago
A boat is heading towards a lighthouse,
larisa86 [58]

Answer: 920.3 ft

Step-by-step explanation:

\tan 7^{\circ}=\frac{113}{x} \\ \\ x(\tan 7^{\circ})=113 \\ \\ x=\frac{113}{\tan 7^{\circ}} \approx \boxed{920.3 \text{ ft}}

4 0
1 year ago
What is the answer about this I really need help
sergey [27]

Answer:

hi

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • 3/4 = what number over 20? Trying to find the Equivalent Fraction
    9·2 answers
  • Graph g(x) = 72 + 2] – 3.
    9·1 answer
  • What is the equation of a line that is parallel to x=−5 and that passes through the point (1,4)
    13·1 answer
  • Can you help me with question 8,9,10,14 please
    13·1 answer
  • Does anyone know the answer to this question? −9y>9
    15·2 answers
  • Find the sum: (n + 7) + (n - 14)
    10·1 answer
  • Michelle purchases a pair of jeans for $35 and a dress for $47. The store charges 8% sales tax on all purchases. How much will M
    15·1 answer
  • Using the slope formula for the point (1,5) and (2,-2),what would the denominator?
    6·2 answers
  • Select the correct answer.
    7·2 answers
  • How many metres are there in 2 kilometres<br>answer in metres​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!