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
ddd [48]
3 years ago
11

Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation i

s inches. The heights of 10 randomly selected students are 75,62,69,65,66,64,67,70,74 and 63.
Mathematics
1 answer:
Mnenie [13.5K]3 years ago
3 0

Answer:

The population mean = sample mean = x`= 67.5

Population standard deviation = 13.369

Sample standard deviation= 4.225

Step-by-step explanation:

AS the population mean is not given we will calculate it from the sample.

The mean of the sampling distribution is equal to the population mean .

The sample mean is calculated by

x`= ∑x/n= 75,+ 62, +69,+65,+66,+64, +67,+70,+74 + 63/10

x`=675/10= 67.5

The standard deviation of the sample is equal to

u = σ/ √n   where σ is the population standard deviation and n is the number of observations.

Calculating the sample mean

s= √∑xi²/n- (∑x/n)²

s= √(45741/10)- (675/10)²

s= 4.2249

σ= u*√n= 4.229 *√10

σ=13.360

You might be interested in
The price of apples at a farm is $1.67 per pound. Which equation can be used to determine c, the total price of n pounds of appl
Tems11 [23]
Answer is c = 1.67n

hope it helps
7 0
3 years ago
MANY POINTS AND WILL GIVE BRAINLIEST!!!
hodyreva [135]
1.
<span>{a, e, i, o}
</span>{a} , {e} , {i} , {o} , {a,e} , {a,i} , {a,o} , {e,i} , {e,o} , {i,o} , {a,e,i} , {a,e,o} , {a,i,o} 

2.
<span>{0, 1, 2}
</span>{0} , {1} , {2} , {0,1} , {0,2} , {1,2}

3. 
<span>Suppose U = {1, 2, 3, 4, 5} is the universal set and A = {2, 3}. What is A ?
Well "A" is {2, 3}, but I'm guessing you meant A'. 
A' is all the numbers you don't see, which is
{1, 4, 5}

4.
</span><span>Suppose U={1, 2, 3, 4, 5, 6, 7, 8} is the universal set and P={2,4, 6, 8}. What is P?
Again, "P" is just {2,4, 6, 8}, but P' is all the numbers you don't see, which are all prime numbers in this sequence:
{1, 3, 5, 7}

5.
</span><span>-4 < k + 3 < 8
subtract 3 from all sides
-7 < k < 5

6.
</span><span> 5 <= y + 2 <= 11
subtract 2 from all sides
3 <= y <= 9

7.
</span><span>6b - 1 < -7 or 2b + 1 > 5
solve both
</span>6b - 1 < -7
add both sides by 1
6b < -6
divide both sides by 6
b < -1

now do the other problem
2b + 1 > 5
subtract both sides by 1
2b > 4
divide both sides by 2
b > 2
answer: b < -1 or b > 2

<span>8.
5 + m > 4 or 7m < -35
subtract both sides by 5 |or| divide both sides by 7
m > -5 or m < -5
m = -5</span>
8 0
4 years ago
What is 3 to the 4 power in life//??????????
Snezhnost [94]

3 to the 4th power is 81, 3 times itself 4 times.

Hope this helps, if not, comment below please!!!!

7 0
3 years ago
What goes into 102 evenly
IgorC [24]
51X2=102
51 goes into 102 evenly twice
5 0
3 years ago
Who do you simplify 10/12
Airida [17]

Answer:

5/6

Step-by-step explanation:

reduce by a number that goes in both numbers like 2

10/2= 5

12/2 = 6

5/6 is the reduce fraction

3 0
3 years ago
Read 2 more answers
Other questions:
  • PLEASE HELP NEED DONE ASAP !! I WILL REWARD BRAINLIEST
    9·1 answer
  • An English teacher reviewed 2 3 of an essay in 1 4 of an hour. At this rate, how many essays can she review in 1 hour?
    8·1 answer
  • which unit rate is the lowest price per ounce? choice a: 25 ounces of potato chips for $3.49 choice b: 45 ounces of potato chips
    14·2 answers
  • Please assist me with these geometry questions​
    13·1 answer
  • How to write 25.784 in expanded form
    13·1 answer
  • Roger and his sister started watching a cartoon movie at 2:45 P.M. The movie was 2 hours and 15 minutes long. After the movie, t
    9·1 answer
  • What is the equation of the line whose graph is shown below?<br> у<br> 8<br> -7<br> х
    5·1 answer
  • Solve by elimination and show all steps please <br><br><br> 3x=2y-7, 2x-y=10
    11·2 answers
  • Evaluate.
    9·2 answers
  • Write down two different expressions that are equivalent to 5x + 2 – 4y.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!