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
Tanya [424]
3 years ago
15

Find the standard deviation for the group of data items 4, 4, 4, 4, 6, 8 The standard deviation is (Simplify your answer. Round

to two decimal places as needed.)
Mathematics
1 answer:
marysya [2.9K]3 years ago
5 0

Answer: 1.53

Step-by-step explanation:

The given data : 4, 4, 4, 4, 6, 8

Number of data values : n= 6

The mean value of the given data will be  :-

\overline{x}=\dfrac{\sum_{i=1}^{6}x_i}{n}\\\\\Rightarrow\ \overline{x}=\dfrac{30}{6}=5

The formula to find standard deviation:_

\sqrt{\dfrac{\sum(x-\overline{x})^2}{n}]

Now,

\sum_{i=1}^{6}(x_i-\overline{x})^2=(-1)^2+(-1)^2+(-1)^2+(-1)^2+(1)^2+(3)^2\\\\=1+1+1+1+1+9=14

The standard deviation will be :-

\sigma=\sqrt{\dfrac{14}{6}}\approx1.53

You might be interested in
What is zero of the polynomial and example
stich3 [128]
<span> Binomials and trinomials are two types of polynomials. The first has two terms and the second has three.</span>
8 0
3 years ago
Can someone simplify these expressions (c)
creativ13 [48]

Answer:

c)

(10x+5)-(-23-2x)=

10x+5+23+2x

=12x+28

2x+5x^2-(3x+7x^2)=

2x+5x^2-3x-7x^2

= -2x^2-1

8 0
3 years ago
About 5 out of 10 people entering a community college need to take a refresher mathematics course. If there are 970 entering​ st
Ksenya-84 [330]

Answer:

"6 out of 10 people" means the ratio of class:no_class is 6:4

990/10 = 99, the smallest the "class" and the "no_class" add up to is 10. And, generally, the total divides with that nicely, as in this case.

99(6) = 594 ----------- probably class

99(4) = 396 ------------------ probably no class

Total  = 990

I hope this helps

Step-by-step explanation:

BRAINLIEST?

4 0
3 years ago
1-4<br> Will give brainliest!!!!<br><br> Pls show work!!
Troyanec [42]
Here you go kind brain

5 0
3 years ago
Read 2 more answers
Is 1.36¯¯¯¯ rational or irational
fenix001 [56]

Answer:

rational

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • The three steps shown below were used to find an expression equivalent to 2/5 (15x- 30y) +10x
    6·2 answers
  • How many centigrams are there in 24 grams?
    15·1 answer
  • -5+2(10b-2)=31 need help thanks!
    6·2 answers
  • Length of the hypotenuse of the triangle to the nearest tenth of a metre
    9·2 answers
  • I need help ASPA with these two questions!!! &lt;3 GIVE THANKS
    12·2 answers
  • Noah made 12 kg of trail mix .He ate 8,600 kg of it .How many liters does he have left.
    7·1 answer
  • 25 ate only breakfast, 15 ate only lunch, 50 ate only dinner, 60 ate only lunch and breakfast, 225 ate only lunch and dinner, 50
    5·1 answer
  • Evaluate the expression: 6(a + b) where a = -3 and b = 6
    14·1 answer
  • Analyze Mathematical Relationships (1)(F) Suppose the measures of ∠1 and ∠2 are in a 4 ∶ 11 ratio. Find their measures. (Diagram
    6·1 answer
  • Dont get this, please help
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!