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
ololo11 [35]
3 years ago
14

The data list shows the scores of ten students in Mr. Smith's math class. 61, 67, 81, 83, 87, 88, 89, 90, 98, 100 What is the st

andard deviation, to the nearest tenth, of the data if the scores represent a sample of Mr. Smith's students
Mathematics
1 answer:
cluponka [151]3 years ago
6 0

Answer:

12.3

Step-by-step explanation:

Step 1

We find the mean

The data list shows the scores of ten students in Mr. Smith's math class. 61, 67, 81, 83, 87, 88, 89, 90, 98, 100

Mean = Sum of terms/Number of terms

Number of terms = 10

Mean = 61 + 67 + 81 + 83 + 87 + 88 + 89 + 90 + 98 + 100/10

Mean = 844/10

Mean = 84.4

Step 2

Standard deviation

The formula for sample standard deviation =

√(x - Mean)²/n - 1

= √[(61 - 84.4)² + (67 - 84.4)² + (81 - 84.4)² + (83 - 84.4)² + (87 - 84.4)² + (88 - 84.4)² + (89 - 84.4)² + (90 - 84.4)² + (98 - 84.4)² + (100 - 84.4)²]/10 - 1

=√ 547.56 + 302.76 + 11.56 + 1.96 + 6.76 + 12.96 + 21.16 + 31.36 + 184.96 + 243.36/10 - 1

= √1364.4/9

= √151.6

= 12.31259518

Approximately to the nearest tenth = 12.3

The standard deviation = 12.3

You might be interested in
Use quadratic equation to find the roots of the following equations
sertanlavr [38]
See the attachment below.

Hope it helps!

3 0
3 years ago
Read 2 more answers
last minute forgot to do it please help and do all of them and I have one more I promise I’ll give you good ratings :D
Zolol [24]

1.) The error is that she attached the

variable with the flat fee (which is

constant) and put the daily rent as a

constant (which is variable).

The correct equation is:

365+125x=250+175x

2.) N=5

3.) k=-35.

Explanation: Solution:

17k-6=37k+4 . 17k-37k=4+6 .

-27k=10 . k=10\cdot(7-2) . k=-35 .

4.)

y =   - \frac{9}{16}

.

5 0
3 years ago
Are these two expressions equivalent to each other?
disa [49]

Answer:

they are equivalent

Step-by-step explanation:

simplifying 12r + p -4r + 6p you get 8r + 7p

so yes they are equal

7 0
3 years ago
A balloon was release and went straight up 3 miles and then the wind blew it 6 miles east. What is the balloon's diagonal back t
mihalych1998 [28]
Don’t know sorry about that
8 0
4 years ago
A farmer plowed a rectangular section of land for a new crop. The section measures 24 1/2 yd by 38 1/2 yd. Find the total area i
MAVERICK [17]

Answer: 943\dfrac{1}{4}\text{ sq. yds}

Step-by-step explanation:

Given ,  A farmer plowed a rectangular section of land for a new crop.

Dimensions of the section is given by :-

Length by width = 24\dfrac{1}{2}\text{ yd by }38\dfrac{1}{2}\text{ yd}

Since , the area of a rectangle = length x width

Then, the total area in yards of plowed section of land will be:

24\dfrac{1}{2}\times38\dfrac{1}{2}\text{ sq. yds}\\\\=\dfrac{2(24)+1}{2}\times\dfrac{2(38)+1}{2}\text{ sq. yds}\\\\=\dfrac{49}{2}\times\dfrac{77}{2}\text{ sq. yds}\\\\=\dfrac{3773}{4}\text{ sq. yds}\\\\=943\dfrac{1}{4}\text{ sq. yds}

Hence, the total area in yards of plowed section of land =  943\dfrac{1}{4}\text{ sq. yds}

8 0
3 years ago
Other questions:
  • Hi Everyone,
    5·1 answer
  • G (-2)=4 (-2)+6. SHOW COMPLETE WORK P,ZZZZ.
    7·2 answers
  • Jessica stuffed bear has a mass of 400 grams. What is its mass in milligrams?
    7·1 answer
  • What is the perimeter of the triangle shown on the coordinate plane, to the nearest tenth of a unit?
    10·1 answer
  • The measure of CDA is 113.42°. what is the value of x?
    13·1 answer
  • What is true product of 5/8 and 3/4
    9·1 answer
  • 6th grade math :D....
    15·2 answers
  • Complete the table for the following equation then graph the line. (Show steps in the middle column of table) y=-3x-2
    14·1 answer
  • There are 6 mushrooms for every 8 olives on a pizza made at Dominoes. On three pizzas there are a total of 56 vegetables on the
    5·2 answers
  • When a number is increased by 40 % it gives 84. Find the original number
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!