Answer: kindly check explanation
Step-by-step explanation:
A) The sample is a fraction of the total population used in the study.
The sample is 1000 19 years of age or older U.S adult.
The population : all U.S adults aged 19 or older.
B.) Confession about bringing cell phone to the bathroom and it is a qualitative variable
C.) point estimate (p) :
Total number of sample = 1000
Number who confessed to bring cellphone = 241
p = 241/ 1000
= 241/1000 = 0.241
D.) The point estimate was deduced from the sample information and not the population. Random selection because selection is unbiased.
E.) 95% confidence interval (CI)
95% CI = (1 - 0.95) = 0.05
For a two-tailed test : 0.05 / 2 = 0.025
Z - score = 1.96
Error : (√[p(1 - p) / n])*z
1.96 * √0.241(1-0.241)/1000
1.96* √0.000182919
1.96 * 0.0135247
= 0.0265085
Boundary :
(0.241 - 0.0265085), (0.241 + 0.0265085)
(0.2144915, 0.2675085)
F) The sample can be said to be representative of the total population since the sampling was performed and participants were chosen at random.
