QUESTION 2a) A psychologist wishes to estimate the average reaction time to a stimulus among 200 patientsin a hospital specializing in nervous disorders. How large a simple random sample should betaken in order to estimate the population mean reaction time with a maximum bound on theerror of 1 second on the error of estimation; i.e. E=1 second. Take azl seconds.b) A sampling frame lists 1000 open accounts. Suppose that a simple random sample ofsize 200 open accounts gave a sample mean of R94.22 with standard deviation ofR21.10.i)Give the sampling fraction and comment in relation to the use of FPCF.ii)Estimate the average due for all 1000 open accounts.i)Estimate the standard error of the sample mean.iv)Estimate the total amount that is due for collection.v)Construct and interpret a 95% confidence interval for the population total amountthat is due for collection.vi)Give the bound on the error of estimation of the total

Since you have asked multiple question, we will solve the first question for you. If you want any…

Answered: a) A psychologist wishes to estimate…

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

Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 50 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that ? = 7.20 ml/kg for the distribution of blood plasma.
A population of N=5 scores has a mean of μ=8. After one score is removed, the mean is found to be μ=7. What is the value of the score that was removed?
Using z scores, a population with u = 37 and o = 6 is standardized so that the new mean is u = 55 and o = 2. After the standardization, one individual has a score of X = 55. What was this individual’s score in the original distribution?
the statistic X defined as X = 49S 2
A physical therapist wanted to know whether the mean step pulse of men was less than the mean step pulse of women. She randomly selected 54 men and 70 women to participate in the study. Each subject was required to step up and down a 6-inch platform. The pulse of each subject was then recorded. The following results were obtained. Two sample T for Men vs Women N Mean StDev SE Mean Men Women 98% CI for mu Men - mu Women (- 12.20, - 1.00) T-Test mu Men = mu Women (vs H2 O C. Ho: H1 = H2; Ha: H1 #H2 (b) Identify the P-value and state the researcher's conclusion if the level of significance was a = 0.01. What is the P-value? P-value =
A population of N = 20 scores has a mean of = 10. One score in the population is changed from X = 25 to X = 5. What is the value of the new population mean?
An IQ test is designed so that the mean is 100 and the standard deviation is 9 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 95 percent confidence that the sample mean is within 2 IQ points of the true mean. Assume that o? = 81 and determine the required sample size.
A population has a mean of u=50 and a standard deviation of 0=10. If 3 points were added to every score in the population, what would be the new values for the mean and standard deviation?
Suppose you have a population of 1,000 individuals and you want to take a random sample of 100 individuals. What is the formula to calculate the standard error of the mean (SE) of the sample mean?
Imagine that a researcher wants to compare the intelligence levels of Poodles to all dogs. He hypothesizes that Poodles will score differently than other dogs. He uses a standard test of dog intelligence in his study. The population of all dogs has a mean of μ = 100, and an SD of 15. He obtains a random sample of 500 Poodles and he finds that the mean intelligence score of the sample is 117. Is this a one- or two- tailed test? Write the Ho and Ha for this research question. What kind of statistic should be calculated to test the hypothesis? Compute that statistic by hand What should the researcher conclude? Write a blurb describing the results
(a) Which of the following statements is TRUE about p-values in general? O The test statistic in a 2-tailed test is the same as the critical value of a confidence interval. O If the p-value of a test statistic is less than the significance level, we reject the null hypothesis at that significance level. O The p-value of a test statistic is always less than or equal to the significance level in a 1-tailed test. O The p-value of a test statistic is always double the significance level in a 2-tailed test. O If we fail to reject the null hypothesis at a specified significance level, then the p-value of the test statistic was less than that significance level. (b) If a hypothesis is rejected at the 5% significance level, what can you conclude? O It must not be rejected at the 2.0% significance level. O It must not be rejected at the 10.0% significance level. O It must be rejected at the 2.0% significance level. O It may or may not be rejected at the 2.0% significance level. O It must be…
Is the difference between the mean annual salaries of statisticians in Region 1 and Region 2 more than $4000? To decide, you select a random sample of statisticians from each region. The results of each survey are shown to the right. At a = 0.10, what should you conclude? Region 1 X1 = $67,700 01 = $8875 Region 2 X2 = $61,000 02 = $9250 n1 = 48 n2 = 44 Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. Choose the correct answer below. O A. Reject Ho. At the 10% significance level, there is sufficient evidence to support the claim that the difference between the mean annual salaries is more than $4000. O B. Fail to reject Ho. At the 10% significance level, there is sufficient evidence to support the claim that the difference between the mean annual salaries is more than $4000. OC. Reject Ho. At the 10% significance level, there is insufficient evidence to support the claim that the difference between…

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