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)

the required function is .

step-by-step explanation:

from the given table it is noticed that the graph passing through (-3,7), (0,4), (3,1) and (8,-4).

it is a linear function because the value of y is decrease by one as the value of x increase by 1.

the slope of the function is

the slope of the function is -1 and the y-intercept is 4.

the slope intercept form is

where, m is slope and b is y-intercept.

therefore the required function is . the graph of this function is shown below.

answer: the first graph

step-by-step explanation: