IQ scores: Scores on an IQ test are normally distributed. A sample of 18 IQ scores had standard deviation s=6.(a) Construct a 99% confidence interval for the population standard deviation σ. Round the answers to at least two decimal places.(b) The developer of the test claims that the population standard deviation is o=8. Does this confidence interval contradict this claim? Explain.Part: 0 / 2Part 1 of 2A 99% confidence interval for the population standard deviation is

Given that,sample size(n) = 18standard deviation(s) = 6population standard deviation() = 8

Answered: IQ scores: Scores on an IQ test are…

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

IQ scores: Scores on an IQ test are normally distributed. A sample of 20 1Q scores had standard deviation s=10. (a) Construct a 99% confidence interval for the population standard deviation o. Round the answ s to at least two decimal places. (b) The developer of the test claims that the population standard deviation is o=13. Does this confidence interval contradict this claim? Explain. Part: 0/ 2 Part 1 of 2 A 99% confidence interval for the population standard deviation is
If n=15n=15, ¯xx¯=43, and s=20s=20, construct a confidence interval at a 90% confidence level. Give your answers to one decimal place. _____< μ < _____ Technology
n1=16 x‾1=124 s1=35 n2=12 x‾2=86 s2=31 Use this data to find the 98% confidence interval for the true difference between the population means. Assume that the population variances are not equal and that the two populations are normally distributed. Copy Data Step 2 of 3 : Find the margin of error to be used in constructing the confidence interval. Round your answer to six decimal places. Step 3 of 3 : Please also find the high and low endpoints and round to four decimal points.
Coffee: The National Coffee Association reported that 61% of U.S. adults drink coffee daily. A random sample of 275 U.S. adults is selected. Round your answers to at least four decimal places as needed. Part 1 of 6 (a) Find the mean μp . The mean μp is 0.61 . Part 2 of 6 (b) Find the standard deviation σp . The standard deviation σp is 0.0294 . Part: 2 / 6 2 of 6 Parts Complete Part 3 of 6 (c) Find the probability that more than 62% of the sampled adults drink coffee daily. The probability that more than 62% of the sampled adults drink coffee daily is
Scores on an English test from 30 students in Class One has a mean of 33 and a standard deviation of 7.2. Scores on an English test from 40 students in Class Two has a mean of 39 and a standard deviation of 5.5. Assuming the two classes are independent, construct a 90%confidence interval for difference between the mean scores for Class One and Class Two. Round your answer to 3 decimal places. Base on the confidence interval, what conclusion can you draw? Group of answer choices (-8.530,-3.470) Group 2 is bigger (-8.530,-3.470) Group 1 is bigger (-8.639,-3.361) No conclusion (-8.639,-3.361) Group 2 is bigger (-6.769,-5.231) Group 2 is bigger
Q-3) Show all the steps for the problem.
Need help urgently please
ch.8 confidence interval mean A researcher is interested in finding a 98% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 144 students who averaged 37.5 minutes concentrating on their professor during the hour lecture. The standard deviation was 11.3 minutes. b. With 98% confidence the population mean minutes of concentration is between (round to 3 decimal places) _____ and _____ minutes. c. If many groups of 144 randomly selected members are studied, then a different confidence interval would be produced from each group. About _____ percent of these confidence intervals will contain the true population mean minutes of concentration and about _______ percent will not contain the true population mean minutes of concentration.
You would like to construct a 99% confidence interval to estimate today's population mean temperature, so you make a series of measurements (a random sample) throughout the day. The mean of these measurements is 58.5 degrees Fahrenheit, and their standard deviation is 3.0 degrees Fahrenheit. (a) What is the best point estimate, based on the sample, to use for the population mean? ( ) degrees
Test scores carry a mean of 550 and a standard deviation of 125 normally distributed. What proportion of the population exceeds 700? Round to at least 4 decimal places. How do I set this problem up and what steps do I need to take to solve it? Please help, I am stuck! Thank you!

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