Sam wants to estimate the percentage of people who have a smart phone. she wants to create a 95% confidence interval which has a margin of error (or me) of at most 2%. how many people should be polled to create the confidence interval?

2401

Step-by-step explanation:

We know that if prior proportion of population doesn't exist , then the formula to find the population proportion is given by :_

Given : Level of confidence = 0.95

Significance level :

Critical value :

Margin of error :

Then ,we have

Hence, the minimum sample size needed =2401

answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

step-by-step explanation:

answer is because 4×10=40

and 98×4= is 392

40,392