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
Margaret [11]
2 years ago
13

Use the following frequency distribution (of SAMPLE DATA) in answering the questions: class 0-9 f=10; class 10-19 f=20; class 20

-29 f=40; class 30-39 f=20; class 40-49 f=10.
1) How many classes are there in this frequency distribution?

2) What is the midpoint of the 3rd class?

3) What is the total number of observations in the frequency distribution?

4) What is the relative frequency of the 3rd class?

5) n the formula for the standard deviation in this problem do you use "N' or "n-1"?

6) What is the value of the mean?

7) What is the value of the standard deviation?

Mathematics
1 answer:
lutik1710 [3]2 years ago
4 0

Answer:

1. Five classes in the frequency distribution

2.The mid point of the third class is 24.5

3.The total number of frequency is 100

4.The relative frequency of the third class is (20/100=0.2)

5. We use n-1 because we are dealing with a sample data

6. The mean is 24.5

7. The value of the standard deviation is 11

Step-by-step explanation:

See attached picture for the solutions

You might be interested in
The sum of two numbers is 48. Their difference is 38. Find the numbers.
Setler79 [48]

Answer:

43 and 5

Step-by-step explanation:

Let's let the two unknown numbers be a and b.

Their sum is 48, therefore:

a+b=48

And their difference is 38. In other words:

a-b=38

We now have a system of equations. To solve, we can use substitution. First, add b to both sides in the second equation:

a=38+b

Substitute this into the first equation:

(38+b)+b=48

Combine like terms:

2b+38=48

Subtract 38 from both sides:

2b=10

Divide both sides by 2:

b=5

So, one of the numbers is 5.

The sum of them is 48. Therefore, the other number is 48-5 or 43.

So, our two numbers are 43 and 5.

And we're done!

4 0
3 years ago
Read 2 more answers
The population of a city is 218720.
vodka [1.7K]
Correct Answer is 205,857
3 0
3 years ago
Evaluate the expression for x=2 and y=4.<br> (x5y?)/(x3y5)
Step2247 [10]

Answer:

(2 x 5 x 5) / (2 x 3 x 4 x 5)

=40/120

= 4/12

= 1/3

5 0
3 years ago
Themba buys 2 boxes of mayos on opening the boxes he find that an average of 2 are damagef in each box how many mayos altogether
borishaifa [10]
We would need to know how many are in each box to figure this out.
4 0
2 years ago
PLEASE HELP!!!!!<br> will mark brainliest!!!!!
PSYCHO15rus [73]

Answer:

x      y

4     7

5     -1

6     -9

5 0
2 years ago
Read 2 more answers
Other questions:
  • A key code must contain 4 numerals. There are 10 numerals available. Using
    7·1 answer
  • A glass vase is shaped like a cylinder and has a radius of 2.5 inches. The vase holds 170 cubic inches of water. How tall is the
    8·1 answer
  • Find the GCF of 60 and 75 using prime factorizations.
    14·1 answer
  • D
    10·1 answer
  • A study reports that college students work, on average, between 4.63 and 12.63 hours a week, with confidence coefficient .95. Wh
    14·1 answer
  • How do I round decimals?
    13·2 answers
  • PLZ HELP!!!!! BEST ANSWER WILL BE CHOSEN FOR BRAINLIEST!
    12·1 answer
  • Is the equation Y=.125x a proportional relationship <br><br> Yes or no
    5·2 answers
  • Question Progress
    12·1 answer
  • (2) Mele scored 70% on
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!