In a study of cell phone use and brain hemispheric dominance, an internet survey was e-mailed to 2455 subjects randomly selected from an online group involved with ears. 931 surveys were returned. construct a 99% confidence interval for the proportion of returned surveys.

0.355,0.405)

Step-by-step explanation:

Given : Significance level :

Number of subjects (n) = 2455

Number of surveys returned = 931

The probability of surveys get return will be :-

The confidence interval for proportion is given by :-

Hence, the 99% confidence interval for the proportion of returned surveys : (0.355,0.405)

160

step-by-step explanation:

idk

i hope i

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632