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
gladu [14]
3 years ago
10

In a data set with mean of 12 and standard deviation of 4, at least what percent of data falls between 4 and 20?

Mathematics
1 answer:
Whitepunk [10]3 years ago
7 0

Answer:

At least 95% of data falls between 4 and 20.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 12

Standard deviation = 4

At least what percent of data falls between 4 and 20?

4 = 12 - 2*4

So 4 is two standard deviations below the mean

20 = 12 + 2*4

So 20 is two standard deviations above the mean

By the Empirical Rule, at least 95% of data falls between 4 and 20.

You might be interested in
Translate the equation using a variable.<br> "Nineteen less than one-half of a number is -13."
Illusion [34]

Answer:

1/2a-19=-13

Step-by-step explanation:

One half of a number represents the phrase "1/2a" (in this case the variable/number is 'a'". Then because it says "nineteen less than", that means you subtract 19 from one half of the variable.

3 0
3 years ago
Read 2 more answers
Determine if the relation is a function. <br><br> (−1,4),(2,4),(3,0),(1,7)
vlada-n [284]

Answer:

It is a function

Step-by-step explanation:

The x values are different; if they were to be the same, such as (1,7),(2,8),(1,9) it would be incorrect.

7 0
3 years ago
Which function will have a y-intercept at –1 and an amplitude of 2?
Angelina_Jolie [31]

Answer:

Options B and D.

Step-by-step explanation:

The general form of sine function

h(x)=A\sin (Bx+C)+D

where, |A| is amplitude, \frac{2\pi}{B} is period, \frac{-C}{B} is phase shift and D is y-intercept.

The general form of cosine function

h(x)=A\cos (Bx+C)+D

where, |A| is amplitude, \frac{2\pi}{B} is period, \frac{-C}{B} is phase shift and D is y-intercept.

In function, f(x)=-\sin x-1

Amplitude : |A|=1

y-intercept : -1

In function, f(x)=-2\sin x-1

Amplitude : |A|=2

y-intercept : -1

In function, f(x)=-\cos x

Amplitude : |A|=1

y-intercept : 0

In function, f(x)=-2\cos x-1

Amplitude : |A|=2

y-intercept : -1

Therefore, the correct options are B and D.

4 0
3 years ago
Read 2 more answers
Match the expression to its simplified form.
kirill115 [55]
5^-2=1/5^2=1/25
2^-4=1/2^4=1/16
5^3=5*5*5=125
2^5=2*2*2*2*2=32

Hope this helped :)
8 0
2 years ago
2+2=?<br><br> Answer <br> 4<br> Gggggggggggggggg
Contact [7]

Answer:

4

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Write each number in scientific notation 1 27.5
    7·2 answers
  • What is the value of x in -4(5x-5)=120
    8·1 answer
  • Please HELP
    7·2 answers
  • The price of a dress in reduced by 60%. When the dress it is reduced by 60% of the reduced price. If the price of the dress afte
    15·1 answer
  • To increase an amount by 7% what single multiplier would you use?
    8·1 answer
  • 46% of 125.7 is what?<br> a. 1.22<br> b. 57.8<br> C. 5782.2<br> d. 273.3
    14·2 answers
  • A large company states in their promotional literature that 80% of their employees have college degrees. If 5 employees are sele
    12·2 answers
  • I will fail if i dont pass this test plzz help!​
    9·1 answer
  • Carlos is shopping for school supplies. He bought a pencil box for $3, and he also needs to buy notebooks. Each notebook is $2.
    14·1 answer
  • Elise's Diner offers its clients a choice of regular and diet soda. Last night, the diner served 28 sodas in all, 14 of which we
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!