Answer:
The correct Answer is 0.0571
Explanation:
53% of U.S. households have a PCs.
So, P(Having personal computer) = p = 0.53
Sample size(n) = 250
np(1-p) = 250 * 0.53 * (1 - 0.53) = 62.275 > 10
So, we can just estimate binomial distribution to normal distribution
Mean of proportion(p) = 0.53
Standard error of proportion(SE) = 
= 
= 0.0316
For x = 120, sample proportion(p) = 
= 
= 0.48
So, likelihood that fewer than 120 have a PC
= P(x < 120)
= P( p^ < 0.48 )
= P(z < 
) (z=
)
= P(z < -1.58)
= 0.0571 ( From normal table )
Answer:
Explanation:
To synchronize computers and mobile devices means to use a cloud service that constantly checks to see if local files are up-to-date with the files in the cloud. These services update the cloud files with the local files if they are overwritten for maximum convenience.
Two strategies for keeping files in sync are using Dropbox. Another way is using iCloud if one has Mac/iOS devices.
Hello!
A pair of ice tongs is an example of a class 3 lever.
<span>Head of Design
Hope this helps ;)</span>
