A poll of2,039randomly selected adults showed that96%of them own cell phones. The technology display below results from a test of the claim that94%of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a0.01significance level to complete parts (a) through (e). Test ofp=0.94vsp≠0.94SampleXNSample p95% CIZ-ValueP-Value119612,0390.961746(0.950804,0.972687)4.130.000a. Is the test two-tailed, left-tailed, or right-tailed? Left-tailed test Two-tailed test Right tailed testb. What is the test statistic? The test statistic isnothing.(Round to two decimal places as needed.)c. What is the P-value? The P-value isnothing.(Round to three decimal places as needed.)d. What is the null hypothesis and what do you conclude about it? Identify the null hypothesis. A.H0: p≠0.94 B.H0: p<0.94 C.H0: p>0.94 D.H0: p=0.94Choose the correct answer below. A.Rejectthe null hypothesis because the P-value isgreater thanthe significance level,α. B.Rejectthe null hypothesis because the P-value isless than or equal tothe significance level,α. C.Fail to rejectthe null hypothesis because the P-value isless than or equal tothe significance level,α. D.Fail to rejectthe null hypothesis because the P-value isgreater thanthe significance level,α.e. What is the final conclusion? A. there is not sufficient evidence to warrant rejection of the claim that 94 % of adults own a cell phoneB.there is not sufficient evidence to support the claim that 94 % of adults own a cell phoneC. A. there is sufficient evidence to warrant rejection of the claim that 94% of adults own a cell phoneD. there is sufficient evidence to support the claim that 94% of adults own a call phone

a. Is the test two-tailed, left-tailed, or right-tailed? ans- this is two-tailed test solution-…

Answered: A poll of 2,039 randomly selected…

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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Question

A poll of

2,039

randomly selected adults showed that

96%

of them own cell phones. The technology display below results from a test of the claim that

94%

of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a

0.01

significance level to complete parts (a) through (e).

Sample	X	N	Sample p	95% CI	Z-Value	P-Value
Test of p=0.94 vs p≠0.94
1	1961	2,039	0.961746	(0.950804,0.972687)	4.13	0.000

a. Is the test two-tailed, left-tailed, or right-tailed?

Left-tailed test

Two-tailed test

Right tailed test

b. What is the test statistic?

The test statistic is

nothing.

(Round to two decimal places as needed.)

c. What is the P-value?

The P-value is

nothing.

(Round to three decimal places as needed.)

d. What is the null hypothesis and what do you conclude about it?

Identify the null hypothesis.

H0: p≠0.94

H0: p<0.94

H0: p>0.94

H0: p=0.94

Choose the correct answer below.

Reject

the null hypothesis because the P-value is

greater than

the significance level,

α.

Reject

the null hypothesis because the P-value is

less than or equal to

the significance level,

α.

Fail to reject

the null hypothesis because the P-value is

less than or equal to

the significance level,

α.

Fail to reject

the null hypothesis because the P-value is

greater than

the significance level,

α.

e. What is the final conclusion?

A. there is not sufficient evidence to warrant rejection of the claim that 94 % of adults own a cell phone

B.there is not sufficient evidence to support the claim that 94 % of adults own a cell phone

C. A. there is sufficient evidence to warrant rejection of the claim that 94% of adults own a cell phone

D. there is sufficient evidence to support the claim that 94% of adults own a call phone

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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