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
Tju [1.3M]
3 years ago
9

The mean hours of sleep that students get per night is 7 hours, the standard deviation of hours of sleep is 1.7 hours, and the d

istribution is approximately normal. Complete the following sentence. For about 95% of students, nightly amount of sleep is between ______.a. 5.3 and 8.7 hrsb. 5 and 9 hrsc. 3.6 and 10.4 hrsd. 1.9 and 12.1 hrs
Mathematics
1 answer:
densk [106]3 years ago
5 0

Answer:

c. 3.6 and 10.4 hrs

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 deviations of the mean.

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

In this problem, we have that:

Mean 7, standard deviation 1.7.

For about 95% of students, nightly amount of sleep is between

7 - 2*1.7 = 7 - 3.4 = 3.6 hours

7 + 2*1.7 = 7 + 3.4 = 10.4 hours

So the correct answer is:

c. 3.6 and 10.4 hrs

You might be interested in
Which one is an expression of distance in si units?
Arada [10]

  

D.500 meters is an expression of distance in SI units.

8 0
3 years ago
Select all of the angles that have a positive measure
lina2011 [118]

Answer:

Just the second one is correct

3 0
3 years ago
Read 2 more answers
Temperature in degrees Fahrenheit can be converted into degrees Celsius using the formula C=5(F-32)/9
aksik [14]

Answer:

F= (9C+160)/5

Step-by-step explanation:

C=5(F-32)/9

make F the subject of the formula= isolate F

5(F-32)=9C

5F-160=9C

5F=9C+160

F= (9C+160)/5

check: a, b, c are all positive integers (a=9, b=160, c=5)

8 0
3 years ago
PLEASE HELP ME <br> WILL AWARD BRAINLIEST
mixas84 [53]

Answer:

I think the answer is b

Step-by-step explanation:

there are the same number of squares in both shapes.

8 0
3 years ago
Read 2 more answers
A baker has three banana muffin recipes. Recipe A uses 3 bananas to make 12 muffins. Recipe Buses 5 bananas to make 24 muffins.
Andrej [43]

Answer: if the question is with what recipe makes the most muffins using the least amount of bananas its recipe B


Step-by-step explanation:

brainly.com/question/9144160 credits to who answered it

3 0
3 years ago
Other questions:
  • What would a 20% increase of 25.9 be? I think it'd be 77.22 but not quiet sure
    15·2 answers
  • Sophia spent 6,274 rand on her trip. She exchanged rate was 1 rand to $0.14. How many U.S. Dollars did Sophia get? Support your
    8·1 answer
  • Mr.Yatabarry’s new carpet covers 128 square feet. It’s twice as long as it is wide. What are the dimensions of the carpet?
    11·1 answer
  • Use the number line.what fraction of 1 foot is 3 inches? what fraction of 1 yard is 3 inches​
    9·1 answer
  • A bookshelf is about 9.3*10^-2 meters thick. A bookshelf is about 1.865*10^1 meters long. About how many copies of this book wil
    13·1 answer
  • Write the equation of a line perpendicular to y= 2x+ 2 that passes through the point (-1, -7).
    10·1 answer
  • You are playing a game in which each player wins, loses, or daws(ties) at each turn. For each turn won, you are awarded 5 points
    15·1 answer
  • The length of a field is three times its width.    If the perimeter is 64 m, what is the width of the field?   A. 8 m   B. 16 m
    9·1 answer
  • If f(x)=logx, explain the transformation that occurs when f(0.25(x-5))+3
    6·1 answer
  • Triangle not drawn to scale
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!