Find the critical value z12 that corresponds to the confidence level 97%.Za/2 =|(Round to two decimal places as needed.)Za12 Use the sample data and confidence level given below to complete parts (a) through (d).In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2596 subjects randomly selected from an online group involved with ears. 963 surveys were returned. Construct a 95% confidence interval for the proportionof returned surveys.Click the icon to view a table of z scores.a) Find the best point estimate of the population proportion p.(Round to three decimal places as needed.)b) Identify the value of the margin of error E.E=D(Round to three decimal places as needed.)c) Construct the confidence interval.O

Note- Since both are different questions, so according to our policy we can answer only one question. Here I am giving a solution for the first question, make a separate request for other questions. Given information- Confidence level, c = 0.97 So, significance level (α) = 0.03

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Find the critical value z12 that corresponds to the confidence level 97%. Za12 =L| (Round to two decimal places as needed.) Za/2

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Average

In mathematics, everyone must have heard the term average in one place or other. Almost all types of calculation require taking out an average. In everyday life, the term is used for denoting a certain amount that can be said to be a typical quantity for multiple people or objects. In other words, if a group of people possesses a certain object, then the average gives us an idea regarding the quantity of the object possessed by each person. However, this is solely based on mathematical calculation. It is important to note that most people will not strictly have the average value in a group.

Question

Find the critical value z12 that corresponds to the confidence level 97%.
Za/2 =|
(Round to two decimal places as needed.)
Za12

Use the sample data and confidence level given below to complete parts (a) through (d).
In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2596 subjects randomly selected from an online group involved with ears. 963 surveys were returned. Construct a 95% confidence interval for the proportion
of returned surveys.
Click the icon to view a table of z scores.
a) Find the best point estimate of the population proportion p.
(Round to three decimal places as needed.)
b) Identify the value of the margin of error E.
E=D
(Round to three decimal places as needed.)
c) Construct the confidence interval.
O<p<O
(Round to three decimal places as needed.)
d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below.
A. One has 95% confidence that the sample proportion is equal to the population proportion.
B. 95% of sample proportions will fall between the lower bound and the upper bound.
C. One has 95% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion.
D. There is a 95% chance that the true value of the population proportion will fall between the lower bound and the upper bound.

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