Level of Confidence,(1-x) 100%90%95%99%Area in Each Tail,0.050.0250.005a2Critical Value, Za/21.6451.962.575 A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the mean HDLcholesterol within 4 points with 99% confidence assuming s= 15.5 based on earlier studies? Suppose the doctor would be content with 95% confidence.How does the decrease in confidence affect the sample size required?Click the icon to view a partial table of critical values.A 99% confidence level requiressubjects. (Round up to the nearest subject.)

Answered: Image /qna-images/answer/5a6be747-d40f-44fe-bbbb-11dffac4128a.jpg

Answered: A doctor wants to estimate the mean HDL…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

How do we set an "alpha level" in science? How is this related to our comparison with a "p-value"?
People were polled on how many books they read the previous year. Initial survey results indicate that s =11.3 books. Complete parts (a) through (d) below. E Click the icon to view a partial table of critical values. (a) How many subjects are needed to estimate the mean number of books read the previous year within six books with 90% confidence? This 90% confidence level requires subjects. (Round up to the nearest subject.) Enter your answer in the answer box and then click Check Answer. 4 parts remaining Clear All DI DD 80 F7 F8 esc F5 F6 F1 F2 F3 F4 @ #3 $ % & 3 4 5 8.
People were polled on how many books they read the previous year. Initial survey results indicate that s = 19.9 books. Complete parts (a) through (d) below. Click the icon to view a partial table of critical values. (a) How many subjects are needed to estimate the mean number of books read the previous year within six books with 90% confidence? This 90% confidence level requires subjects. (Round up to the nearest subject.) Partial Critical Value Table (b) How many subjects are needed to estimate the mean number of books read the previous year within three books with 90% confidence? This 90% confidence level requires subjects. (Round up to the nearest subject.) (c) What effect does doubling the required accuracy have on the sample size? Level of Confidence, Critical Value, Za/2 (1- a) • 100% Area in Each Tail, 2 A. Doubling the required accuracy nearly quadruples the sample size. 90% 0.05 1.645 B. Doubling the required accuracy nearly doubles the sample size. 95% 0.025 1.96 99% 0.005…
In most cases of study, the statistical analysis is not giving the precise value of measurement but only giving the best estimation value of the precise value. Why is it so?
A poll was conducted that asked 1010 people how many books they had read in the past year. Results indicated that x= 10.5 books and s= 16.6 books. Construct a 99% confidence interval for the mean number of books people read. Click the icon to view the table of areas under the t-distribution. Construct a 99% confidence interval for the mean number of books people read. (Use ascending order. Round to two decimal places as needed.)
Identify the t-score for a 95% confidence interval if the sample size is 15. t = the answer isnt 2.131 so what is the answer?
People were polled on how many books they read the previous year. Initial survey results indicate that s = 14.3 books. Complete parts (a) through (d) below. Click the icon to view a partial table of critical values. (a) How many subjects are needed to estimate the mean number of books read the previous year within four books with 90% confidence? This 90% confidence level requires 35 subjects. (Round up to the nearest subject.) (b) How many subjects are needed to estimate the mean number of books read the previous year within two books with 90% confidence? This 90% confidence level requires subjects. (Round up to the nearest subject.)
People were polled on how many books they read the previous year. Initial survey results indicate that s = 14.3 books. Complete parts (a) through (d) below. Click the icon to view a partial table of critical values. GOLDA (a) How many subjects are needed to estimate the mean number of books read the previous year within four books with 90% confidence? This 90% confidence level requires 35 subjects. (Round up to the nearest subject.) (b) How many subjects are needed to estimate the mean number of books read the previous year within two books with 90% confidence? This 90% confidence level requires 139 subjects. (Round up to the nearest subject.) (c) What effect does doubling the re accuracy have on the sample size? OA. Doubling the required accuracy nearly doubles the sample size. B. Doubling the required accuracy nearly halves the sample size. C. Doubling the required accuracy nearly quadruples the sample size. D. Doubling the required accuracy nearly quarters the sample size. (d) How…
do the last one please
A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females, How many subjects are needed to estimate the mean HDL cholesterol within 3 points with 99% confidence assuming s= 14.5 based on earlier studies? Suppose the doctor would be content with 90% confidence, How does the decrease in confidence affect the sample size required? E Click the icon view a partial table of critical values. A 99% confidence level requires 155 subjects. (Round up to the nearest subject.) A 90% confidence level requires subjects. (Round up to the nearest subject.) A Partial Critical Value Table Level of Confidence, (1-a) - 100% Critical Value, z12 Area in Each Tail. 2. 90% 0.05 1.645 1.96 2.575 95% D.025 99% 0.005 Print Done Enter your answer in the answer box and then click Check Answer
Researchers studied the mean egg length (in millimeters) for a bird population. After taking a random sample of eggs, they obtained a 95% confidence interval of (45,60). What is the value of the margin of error? Choose the correct answer below. A. 15 mm B. 52.5 mm O c. 7.5 mm O D. 1.96
A poll was conducted that asked 1015 people how many books they had read in the past year. Results indicated that x= 14.3 books and s= 16.6 books. Construct a 90% confidence interval for the mean number of books people read. E Click the icon to view the table of areas under the t-distribution, Construct a 90% confidence interval for the mean number of books people read. ) (Use ascending order. Round to two decimal places as needed.)

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS