Consider a paint-drying situation in which drying time for a test specimen is normally distributed with a 8. The hypotheses Ho: = 75 and H₂: < 75 are to be tested.using a random sample of n = 25 observations.(a) How many standard deviations (of X) below the null value is x 72.37 (Round your answer to two decimal places.)standard deviations(b) If x= 72.3, what is the conclusion using a 0.017 (Round your answers to two decimal places.)test statisticz=critical value z =What can you conclude?O Reject the null hypothesis. There is not sufficient evidence to conclude that the mean drying time is less than 75.O Do not reject the null hypothesis. There is sufficient evidence to conclude that the mean drying time is less than 75.O Do not reject the null hypothesis. There is not sufficient evidence to conclude that the mean drying time is less than 75.O Reject the null hypothesis. There is sufficient evidence to conclude that the mean drying time is less than 75.(c) What is a for the test procedure that rejects Ho when zs -2.767 (Round your answer to four decimal places.)(d) For the test procedure of part (c), what is (70)? (Round your answer to four decimal places.)B(70) -(e) If the test procedure of part (c) is used, what n is necessary to ensure that (70) 0.017 (Round your answer up to the next whole number.)(Mspecimens

Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for…

Answered: Consider a paint-drying situation in…

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

22
i just cant seem to get these problems
145.7 and o= 54.4. You intend to draw a A population of values has an unknown distribution with μ = random sample of size n = 239. What is the mean of the distribution of sample means? (Please enter an exact answer.) H₂ = What is the standard deviation of the distribution of sample means? 01 = (Please report your answer accurate to 2 decimal places.)
Q3: There is claim that the mean annual turnover rate of the 300 count bottle of B Aspirin is changed. Therefore a random sample of 33 is chosen that show the average is 10 and the standard deviation is 7. Use 0.05 significant level If the test statistics is -9, he claim mean is
Researcher believe that the standard deviation in the crime rate is decreased by 30. To detect such a decrease in the standard deviation for the standard deviation of 190, power of.at leastQ.90. with the level of significance 0.03. Determine and report the required sample size to detect such a difference (decrease):| Enter a number. If the decrease in standard deviation was 20 instead of 30, would the required sample size be less or more? O more less
A company is doing a hypothesis test on the variation of quality from two suppliers. Both distributions are normal, and the populations are independent. use a = 0.01 The standard deviation of the first sample is 2.9577 with a sample size of 26 7.1999 is the standard deviation of the second sample with a sample size of 13. The test statistic (rounded to 3 decimal places) is = O Fail to reject the null hypothesis O Reject the null hypothesis
Suppose that a committee is studying whether or not there is waste of time in our judicial system. It is interested in the mean amount of time individuals waste at the courthouse waiting to be called for jury duty. The committee randomly surveyed 81 people who recently served as jurors. The sample mean wait time was eight hours with a sample standard deviation of two hours. a) (i) Enter an exact number as an integer, fraction, or decimal. x = hrs (ii) Enter an exact number as an integer, fraction, or decimal. sx = hrs (iii) Enter an exact number as an integer, fraction, or decimal. n = (iv) Enter an exact number as an integer, fraction, or decimal. n − 1 = b)Which distribution should you use for this problem? (Enter your answer in the form z or tdf where df is the degrees of freedom.)
A researcher is to perform a hypothesis test for a single populaiton mean with null and alternative hypotheses given below. HoiH=100 Hail#100 The researcher collects a sample of size n= 157 with sample mean y= 1072 and sample standard deviation Calculate the p-value. s= 34.8. Answer as a decimal and not a percentage with accuracy to at least 4 decimal places.
The people who survived the titani are more from lower class department than upper class department. A sample of 200 people of upper class department who survived with a mean age of 28 and standard deviation of 1.6 and a sample of 505 people of lower class department who survived with a mean age of 35 and standard deviation of 1.2.Test the hypothesis wih 0.05 level of significance?
Please circle all answers!
The lengths of bolts produced in a factory may be taken to be normally distributed. The botlts are checked on two "go-no go" gauges and those shorter tthan 2.9 or longer than 3.1 inches are rejected. A random sample of 50 bolts are checked. If the n1 = 12 and n2 = 12, estimate the mean and the standard deviation for these bolts. State your assumptions. n1 being the number of bolts below 2.9 and n2 is the number of bolts above 3.1.
How would I even begin or do any of this? I know the mean is : 65 & the standard deviation is: 25, n = 77. But how would I go about getting the answer?I got normalcdf(77, E99, 65, 25) but my answer is never right - according to my teacher....What am I doing wrong?

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