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
Crazy boy [7]
3 years ago
14

A set of data with a mean of 45 and a standard deviation of 8.3 is normally distributed. Find the value that is –2 standard devi

ations away from the mean.
Mathematics
2 answers:
dybincka [34]3 years ago
6 0
45+8.3 = 53.3 

<span>45 - (2(8.3)) = 28.4

The value is </span> 28.4 <span>that is –2 standard deviations away from the mean.</span><span>

</span>
Kamila [148]3 years ago
4 0

Answer: 28.4

Step-by-step explanation:

Given : A set of data with a mean of \mu= 45and a standard deviation of  \sigma=8.3 is normally distributed.

Now, the value that is –2 standard deviations away from the mean is given by :-

x=\mu-2\sigma\\\\\Rightrrrow\ x=45-2(8.3)\\\\\Rightarrow\ x=45-16.6\\\\\Rightrrrow\ x=28.4

Hence, the value that is –2 standard deviations away from the mean. = 28.4

You might be interested in
8/9 + 2/3 + 1/6 = PLeASe HeLp<br><br>A. 11/8<br><br>B. 11/15<br><br>C. 1 13/18<br><br>D. 1 2/9
blondinia [14]

Answer:

C. 1 13/18

Explanation:

7 0
3 years ago
What is the solution to the following system of equations?<br><br> 3x - 2y = 4<br><br> x + 2y = 4
ivanzaharov [21]

Answer:

i have no clue lol

Step-by-step explanation:

i have no clue lol

4 0
3 years ago
Ace does various odd jobs over the summer on one of his jobs he was paid $81 for a job he completed in nine hours. if he average
Vikentia [17]
He is making $9 an hour bc 81/9=9
9x26=$234
9x35=$315
after working 26 full hours he will have made a total of $234
total earnings:$315

I hope that is what you were looking for!
8 0
3 years ago
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
anzhelika [568]

Sample standard deviation

Mean of data = 84.4

Calculate deviations from the mean = 23.4, 17.8, 3.4, 1.4, -2.6, -3.6, -4.6, -5.6, -13.6 and -15.6

Squaring these deviations; we get 547.56, 316.84, 11.56, 1.96, 6.76, 12.96, 21.15, 31.36, 184.96, 243.36

Adding these we get 1378.47

As its a sample Std Dev we divide by 10 - 1 = 9. For the popklation Std Dev we divide by the number of scores (10).

Std Deviation for sample = sqrt ( 1378.47 / 9) = 12.4 to nearest tenth (answer)

Population Std Dev = sqrt (1378.47 / 10) = 11.7 answer

Theres a lot of arithmetic there so hope i haven't slipped up anywhere!

6 0
3 years ago
Kris is 12 feet tall and casts a shadow 8 feet long. At the exact same time, a statue casts a shadow 24 feet long. What is the h
Artyom0805 [142]
16 feet

12×2=24
8×2=16
8 0
2 years ago
Other questions:
  • It takes 32 hours for a motorboat moving downriver to get from pier A to pier B. The return journey takes 48 hours. How long doe
    5·2 answers
  • The measures of three parts of ABC are given in the diagram. What is AC, correct to two decimal places?
    10·1 answer
  • Find the value of x <br> :D
    10·1 answer
  • A rose garden is formed by joining a rectangle and a semicircle, as shown below. The rectangle is 24 ft long and 16 ft wide.
    14·2 answers
  • PLEASE HELP ME PLZ PLZ PLZ
    11·1 answer
  • Mr. Allway’s math class surveyed all the seventh-grade students to find out their favorite sport. The following circle graph sho
    12·2 answers
  • ✧・゚:Multiple Choice:・゚✧
    15·2 answers
  • Find an equation of the line L. L is perpendicular to y=-2x and is passing through points 2,-4
    11·1 answer
  • Which of the following rules describes the pattern in the table?
    14·1 answer
  • Quadrilateral abcd has vertices A(4,0),B(3,3),C(-3,1) and D(-2,-2)
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!