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
Ket [755]
3 years ago
9

Suppose the test scores on an exam show a normal distribution with a mean of 82 and a standard deviation of

Mathematics
1 answer:
Zanzabum3 years ago
5 0

Answer:

a) Between 74 and 90

b) 81.86% of the scores are between 78 and 90

Step-by-step explanation:

a) According to the Empirical Rule, in a normal distribution, 95% of the data are within 2 standard deviations of the mean. Therefore, the range that 95% of the scores fall in is between 82-4(2)=74 and 82+4(2)=90.

b) The percent of scores that are between 78 and 90 is: normalcdf(lower,upper,μ,σ) = normalcdf(78,90,82,4) = 0.8185946784 ≈ 0.8186, or about 81.86% of the scores.

You might be interested in
А
VikaD [51]

Answer:

m < C = 60

...........

Step-by-step explanation:

m < B = m < E = 70

m < C= 180 - ( 70+50 ) = 60

4 0
3 years ago
Please help, i need to pass. which function represents the inverse of function f below? ​
Anvisha [2.4K]

Answer:

B

Step-by-step explanation:

If you switch the x and y you can solve for the inverse by solving for y like this:

x=3y+5

3y=x-5

y=(x-5)/3

which can be rewritten as B.

6 0
3 years ago
The head librarian at a public library releases a report. The report states that visitors to the library want the library to ope
pogonyaev

Answer:

Step-by-step explanation:

The question is not biased.  It doesn't push the participants to answer one way or another.

However, the sample is biased.  It does not represent the population.

The first and fourth options are correct.

5 0
3 years ago
Evaluate x(y+3)/(3+y)z for x = 2, y = 5, and z = 1.
lesya [120]

Answer:

2

Step-by-step explanation:

hope this helps

8 0
3 years ago
Read 2 more answers
Yeah I’m not good at this
levacccp [35]

For the given triangle, x = 5.1 cm and y = 6.1 cm.

Step-by-step explanation:  

Step 1:  

In the given triangle, the angle is 50°. It is given that the opposite side has a length of y cm and the adjacent side has a length of y cm.   The hypotenuse of the triangle measures 8 cm.

To determine the length of the opposite side of the triangle, we use the sin of the given angle.  

To determine the length of the adjacent side of the triangle, we use the cos of the given angle.  

sin \theta = \frac{oppositeside}{hypotenuse} , cos \theta = \frac{adjacentside}{hypotenuse}.

Step 2:  

In the given triangle,  

The length of the opposite side = y cm,  

The length of the adjacent side = x cm,  

The length of the hypotenuse = 8 cm,  

The angle of the triangle = 50°.

sin \theta = \frac{oppositeside}{hypotenuse} , sin 50 = \frac{y}{8}.

y = 0.7660 (8) = 6.128.

cos \theta = \frac{adjacentside}{hypotenuse} , cos 50 = \frac{x}{8}.

x = 0.6427 (8) = 5.1416.

So x = 5.1416 cm and y = 6.128 cm. Rounding these off to one decimal place, we get x = 5.1 cm and y = 6.1 cm.

8 0
4 years ago
Other questions:
  • The center of a sphere is
    7·1 answer
  • I forgot what length width height V stands for in mathematics cubic feet can someone help me
    15·1 answer
  • The purple pathers helipad is 1/3 of a mile from the control center we'll drop the food when it's 1/4 of the way there how many
    5·2 answers
  • Which tool(s) are needed to construct a perpendicular bisector of a line segment?
    9·2 answers
  • HELP!! ILL GIVE THE BRIANLIEST to whoever ANSWERS CORRECTLY!!
    9·2 answers
  • What’s the correct answer for this?
    14·2 answers
  • Number that appears the most in a given set of data
    5·2 answers
  • Can someone please help me. I’ll mark you brainiest.
    5·1 answer
  • What is 21 X 21 ???? <br> 3 3​
    10·2 answers
  • Select all the statements that best describe the graph below.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!