Determine the upper limit of a 95% confidence level estimate of the population proportion when the sample size is 200 customers, 35 of whom respond yes to a survey.

0.228

Step-by-step explanation:

We know that the formula to find the upper limit of confidence interval for population proportion is given by :-

, where

n= Sample size

= Sample proportion

z* = critical value.

Let p be the  proportion of customers who responds yes to a survey.

As per given , we have

n= 200

Confidence level : 95%

The critical z-value for 95% confidence is z* = 1.96  [ from z-table]

Substitute all values in the formula , we get

Hence, the upper limit of a 95% confidence level estimate of the population proportion is 0.228.

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x