Answer:
The 95% confidence interval for the true proportion of university students who use laptop in class to take notes is (0.2839, 0.4161).
Step-by-step explanation:
The (1 - <em>α</em>)% confidence interval for population proportion <em>P</em> is:
The information provided is:
<em>x</em> = number of students who responded as"yes" = 70
<em>n</em> = sample size = 200
Confidence level = 95%
The formula to compute the sample proportion is:
The R codes for the construction of the 95% confidence interval is:
> x=70
> n=200
> p=x/n
> p
[1] 0.35
> s=sqrt((p*(1-p))/n)
> s
[1] 0.03372684
> E=qnorm(0.975)*s
> lower=p-E
> upper=p+E
> lower
[1] 0.2838966
> upper
[1] 0.4161034
Thus, the 95% confidence interval for the true proportion of university students who use laptop in class to take notes is (0.2839, 0.4161).
The answer is 15.
hope this helps!
Step-by-step explanation:
I hope the picture is visible
:)
Answer:
836 cubic centimeters
Step-by-step explanation:
We need to add together the volumes of the three cubes.
Vcube = s*s*s
<u>Small cube:</u> V = 2^3 = 8
<u>Medium cube:</u> V = 7^3 = 343
<u>Large cube:</u> V = 8^3 = 512
Total volume: 8 + 343 + 512 = <u>836 cubic centimeters</u>
To me this looks an equation that would fall under the commutative property of multiplication but i’m not seeing that as a possible answer so if you can i would put commutative property of multiplication:)