Question

In: Statistics and Probability

In the study of cell phone use and brain hemispheric dominance, an internet survey was emailed...

In the study of cell phone use and brain hemispheric dominance, an internet survey was emailed to 2524 subjects randomly selected from an online group involved with ears. 930 surveys were returned. Construct a 99% confidence interval for the proportion of returned surveys.

A. Find the best point estimate of the population proportion p

B. Identify the value of the margin of error E.

C. Construct the confidence interval

Expert Solution

Solution :

Given that,

n = 2524

x = 930

Point estimate = sample proportion = = x / n = 930/2524=0.368

1 - = 1- 0.368 =0.632

At 99% confidence level the z is ,

= 1 - 99% = 1 - 0.99 = 0.01

/ 2 = 0.01 / 2 = 0.005

Z/2 = Z0.005 = 2.576 ( Using z table )

Margin of error = E = Z / 2 * ( $\sqrt$ ((( * (1 - )) / n)

= 2.576* ( $\sqrt$ ((0.368*0.632) /2524 )

E = 0.0247

A 99% confidence interval for population proportion p is ,

- E < p < + E

0.368 -0.0247 < p <0.368+ 0.0247

0.3433< p < 0.3927

The 99% confidence interval for the population proportion p is : 0.3433,0.3927

orchestra answered 2 years ago

In a study of cell phone use and brain hemispheric dominance, an internet survey was emailed...

In a study of cell phone use and brain hemispheric dominance, an internet survey was emailed to 2601 subjects randomly selected from an online group involved with ears. 975 surveys were returned. Construct a 90% confidence interval for the proportion of returned surveys. a) What is the best point estimate of the population P c) Construct the confidence level b) Identify the value of the margin of error E. c) Construct the confidence level.

in a study of cell phone use and brakn hemispheric dominance, an internet survey was emailed...

in a study of cell phone use and brakn hemispheric dominance, an internet survey was emailed to 2319 subjects randomly selected from an online group involved with ears. 1022 surveys were returned. construct a 95% confidence interval for the proportion of returned surveys A. find the best point estimate of the populatiom proportion p B. identify the value of the margin of error E C. construct the confidence interval

In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2616 subjects randomly selected from an online group involved with ears.1023 surveys were returned. Construct a 99% confidence interval for the proportion of returned surveys. 1. find the best point estimate of the population proportion p ( round to three decimal places as needed) 2. identify the value of the margin of error E 3. Construct the convidence interval ____<p<______ 4. write a...

In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2592 subjects randomly selected from an online group involved with ears. 913 surveys were returned. Construct a 99% confidence interval for the proportion of returned surveys.

In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2446 subjects randomly selected from an online group involved with ears. 1083 surveys were returned. Construct a 99% confidence interval for the proportion of returned survey.

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6985 subjects randomly selected from an online group involved with ears. There were 1295 surveys returned. Use a 0.01 significance level to test the claim that the return rate is less than 20%. Use the P-value method and use the normal distribution as an approximation to the binomial distribution.

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6973 subjects randomly selected from an online group involved with ears. There were 1299 surveys returned. Use a 0.01 significance level to test the claim that the return rate is less than 20%. Use the P-value method and use the normal distribution as an approximation to the binomial distribution.

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6978 subjects randomly selected from an online group involved with ears. There were 1331 surveys returned. Use a 0.01 significance level to test the claim that the return rate is less than 20%. Use the P-value method and use the normal distribution as an approximation to the binomial distribution.

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6978 subjects randomly selected from an online group involved with ears. There were 1331 surveys returned. Use a 0.01 significance level to test the claim that the return rate is less than 20%. Use the P-value method and use the normal distribution as an approximation to the binomial distribution.

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6980 subjects randomly selected from an online group involved with ears. There were 1332 surveys returned. Use a 0.01 significance level to test the claim that the return rate is less than 20%. Use the P-value method and use the normal distribution as an approximation to the binomial distribution. Identify the null hypothesis and alternative hypothesis. A. Upper H 0: pequals0.2 Upper H...

Question

In the study of cell phone use and brain hemispheric dominance, an internet survey was emailed...

Solutions

Expert Solution

Related Solutions

In a study of cell phone use and brain hemispheric dominance, an internet survey was emailed...

in a study of cell phone use and brakn hemispheric dominance, an internet survey was emailed...

In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed...

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed...