The table below shows data from a survey about the amount of time students spend doing homework each week. The students were either in college or in high school:High Low Q1 Q3 IQR Median Mean σ
College 20 6 8 18 10 14 13.3 5.2
High School 20 3 5.5 16 10.5 11 11 5.4
Which of the choices below best describes how to measure the spread of this data?
A. Both spreads are best described with the IQR.
B. Both spreads are best described with the standard deviation.
C. The college spread is best described by the IQR. The high school spread is best described by the standard deviation.
D. The college spread is best described by the standard deviation. The high school spread is best described by the IQR.
Answers
Answer:
C. The college spread is best described by the IQR. The high school spread is best described by the standard deviation.
Step-by-step explanation:
If data is normally distributed we use Standard deviation otherwise we use Interquartile Range (IQR) for measuring the spread.
Further, data is said to be normally distributed if Mean = Median = Mode.
So, High School data is normally distributed but College data is not.
So, We measure the spread of College data by IQR and High School data by Standard Deviation.
Thus, Option C is the only correct option.
Related Questions
Jack spends 1 and a quarter as long on his homework as Jill. Last week Jill spent 9 and three quarters of a hour on his homework. How long did Jack take??? Write the answer as a mixed number! Thnx!
What does the line x= 2 look like?
What is –15 ÷3/5 ?A. –25 B. –9 C. -1/9 D. -1/25
PLSSS!!!!! HELP ME!!!! I WILL MARK U!!! MATH!!!!!!!!!!!!
Answers
Answer:
36 in.
Step-by-step explanation:
Step 1:
Area = Length × Width Equation
Step 2:
6 × 6 Multiply
Answer:
36 inches
Hope This Helps :)
x < 17
x > 9
x > 17
Answers
Answer:
The last option is the correct answer.
Step-by-step explanation:
The given inequality is :
Pairing the like terms together we have :
=>
Now we will divide both sides by 2;
=>
Thus, the answer is .
The last option is the correct answer.
Answer D (x>17)
6x-8>4x+26
==>6x-4x>26+8
==>2x>34
==>x>17
Answers
FYI:
Sorry, I can't answer your second question because I can't see any number-lines in your question. But yes, I can answer the first one.
Answer:
400 T-Shirts
Step-by-step explanation:
If each T-Shirt is $20.50, that means that Carlene has to sell lots of them in order to earn the amount of money she wants. So, to find how many T-Shirts she needs to sell in order to get $9,100, we have first remove $900 dollars from the $9,100, because she ALREADY earned it!
9,100-900=8,200
Now we have to divide $8,200 by $20.50. like this...
8,200÷20.50=400
Now, that's our answer. 400.
Carlene has to sell 400 more T-Shirts in order to earn to her goal!
Thank You! Please mark me brainliest so that I can get encouraged to make more great answers like this one!
2, 7, and 5
d and f
2 and 5
2d, 7, and 5f
Answers
Answer:
• d and f
Step-by-step explanation:
• take an example of;
→ ax + by + 1
- a and b are coefficients
- x and y are terms
- 1 is a constant
find f(g(x)).
3
f(g(x)) = [?]
Simplify your answer as much as possible.
Answers
Answer:
Step-by-step explanation:
f(x) = 3x - 2 When you see something like f(g(x)) it means that wherever you see an x on the right, you put g(x).
f(g(x)) = 3(g(x)) - 2 Now wherever you see g(x) on the right, you put in x + 2
f(g(x)) = 3(x + 2) - 2 Now remove the brackets
f(g(x)) = 3x + 6 - 2
f(g(x)) = 3x + 4
I'm not sure what the 3 in line 4 means. 3x + 4 seems to be the answer you want however.
Answer:
3x+4
Step-by-step explanation:
f(g(x))=3(x+2)-2
=3x+6-2
=3x+4
Answers
The area of a rectangle is given by:
A = (w) * (l)
Where,
w: width
l: long
Substituting values we have:
(54x ^ 9y ^ 8) = (w) * (6x ^ 3y ^ 4)
Clearing w we have:
w = (54x ^ 9y ^ 8) / (6x ^ 3y ^ 4)
Rewriting:
w = (9 * x ^ 6y ^ 4)
Answer:
the length of the rectangle is:
w = (9 * x ^ 6y ^ 4)