Question 6 options:

an online retailer wants to estimate the number of visitors that click on their advertisement from a particular website. of 978 page views in a day, 8% of the users clicked on the advertisement.

create a 90% confidence interval for the population proportion of visitors that click on the advertisement.

Step-by-step explanation:

The confidence interval for population proportion (p) is given by :_

, where n= sample size

z* = Critical value.

= Sample proportion.

Let p be the true population proportion of visitors that click on the advertisement.

As per given , we have

n= 978

Critical value for 90% confidence interval : z* = 1.645   [ By z-table]

Now , 90% confidence interval for the population proportion of visitors that click on the advertisement:

Hence, a 90% confidence interval for the population proportion of visitors that click on the advertisement.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18