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
Vlad [161]
3 years ago
6

HELP PLS!! A study conducted by the Center for Disease Control that asked 15,000 students about their sleep habits showed that a

bout 73% of high school students did not get the required 8 hours of sleep per night. Let p be the proportion of high school students who do not get 8 hours of sleep daily.
1.What is the mean of the sampling distribution of p?



2. Find the standard deviation of the sampling distribution of p. Round to 4 decimal places. ( decimal form pls obvi )



3. Find the probability of selecting a sample of 15,000 students in which between 70% and 75% of the students did not get 8 hours of sleep every day.
Mathematics
1 answer:
nexus9112 [7]3 years ago
8 0

Answer:

Step-by-step explanation:

so if you have 15k and 73% and 8 hours what you need to do is do the math and do 15x8 what did you get so you have to go to the 73% what was you answer to 15x8 add that to 73 and you can do 45 in to 100

You might be interested in
Given that two figures are similar, use a scale factor to find the missing length
anastassius [24]

The missing length x is 99 m.

Solution:

Given polygons are similar.

<em>If two triangles are similar, then the corresponding sides are in proportion.</em>

$\Rightarrow\frac{81}{18}=\frac{x}{22}

Multiply by 22 on both sides, we get

$\Rightarrow\frac{81}{18}\times 22=\frac{x}{22}\times 22

$\Rightarrow\frac{9}{2}\times 22=x

⇒ 9 × 11 = x

⇒ 99 = x

Switch the sides.

⇒ x = 99

The missing length x is 99 m.

8 0
3 years ago
Which number has a 9 that is 1/10 the value of the 9 in 296?
Lisa [10]
Can i have the answers?
It would be something like this

129 the nine would be in one spot to the right of the other nine since it is 1/10 and any fraction number means moving the digit right and a whole number would mean moving to the left pls give brainliest
5 0
3 years ago
Find the area of this semi-circle with diameter, d = 49cm.<br> Give your answer rounded to 2 DP.
lilavasa [31]
The area of a semicircle is (πr^2)/2, with r being the radius
the radius is going to be the diameter diced by two: 49/2 = 24.5
now, plug in and solve
(π24.5^2)/2 = 600.25π/2 = 300.125 π
π is roughly equivalent to 3.14, so we can multiply to simplify
area = 942.87

8 0
2 years ago
By what number should -5/27 be divided to get -7/20?
jarptica [38.1K]

Answer:

Step-by-step explanation:

3 0
3 years ago
If
lesantik [10]

Answer:

x = (64 + 5) ÷ 3

Step-by-step explanation:

                                        3x - 5 = 64

Add 5 to both sides:            3x = 64 + 5 = 69

Divide both sides by 3:          x = 69 ÷ 3 = 23

So the answer is x = (64 + 5) ÷ 3

Note:  If we didn't add the parentheses then using the order of operation x = 64 + 5 ÷ 3 would be x = 64 + \frac{5}{3} = 65 \frac{2}{3}

8 0
3 years ago
Other questions:
  • One cubic meter (1.0 m3) of aluminum has a mass of 2700 kg, and a cubic meter of iron has a mass of 7860 kg.. Find the radius of
    7·1 answer
  • Solve <br> 12-(4×2+2)+3×5=
    11·1 answer
  • A rectangular box with a volume of 684 ftcubed is to be constructed with a square base and top. The cost per square foot for the
    12·1 answer
  • Plz help!! Quesion above
    12·1 answer
  • Solve -5.55-8.55c+4.35c for me please
    9·1 answer
  • Write out the first three terms and the last term. Then use the formula for the sum of the first n terms of an arithmetic sequen
    12·1 answer
  • What is the value of y?
    6·1 answer
  • The shape of Oklahoma can be divided into 2 perfect rectangles and 1 triangle. About how many square miles does Oklahoma cover
    10·1 answer
  • How many lines of symmetry does the figure below appear to have
    15·1 answer
  • 3 divided by 534 using estimate
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!