Question

Among college students, Apple’s iPhone has a huge share of the market. Some reports say it is as high as 82%. Create a 95% confidence interval for the percentage of Maryland public college/university students that have an iPhone. Be sure to include a summary statement. How do Maryland public college/university students’ iPhone ownership compare to nationwide percentage?
Android-222

Apple-1,157

Other-5

No smartphone-1

No response-6

Answer 1

total number of sample =222+1157+5+1+6 =1391

of this i phone users are 1157

We are 95% confident that the proportion of Maryland public college/university students’ iPhone ownership lie within the interval calculated above.

0.82 le between the interval limits thus it can be said that the percentage of  Maryland public college/university students’ iPhone ownership is not so different than the nationwide percentage