b) The following table shows the time students from a college took to complete a marathon.Time (minutes)30-3233-3738-4445-47Frequency9143aFrequency Density34bii)Calculate the mean timeiii)Calculate the modeiv)Calculate the variance

Table is given : We know Frequency density = ( frequency / class width) We have to get values of a…

Answered: b) The following table shows the time…

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

A park ranger is searching for bears in a region of the park where on average there are 5 bears per square mile. The bears are solitary independent creatures, so it is reasonable to assume that the numbers of bears in disjoint regions are independent unknowns and that the number expected in any region is proportional to the area of the region. The ranger can also assume that in a very tiny region, say a square inch, it is impossible to find more than one bear. What is the variance in the number of bears he will find in a 5 square mile region of the park?
Assume that the population consists of only these eleven data points for y and z. Construct one sample for y and one another sample for z by using 5 data points which gives the maximum variance.
Let the random variable X be defined on the support set (1,2) with pdf fX(x) = (4/15)x3, Find the variance of X.
A machine filling 18-gram containers of a hair dye is set so that the average fill is18.2 grams with a variance of 0.49 grams. Assume that the filling of containers bythis machine is normally distributed.(a) What percentage of the containers is not likely to meet the producer’sspecification of at least 18 grams per container?(b) What is the minimum mass of the heaviest 15% of containers?
Show that the mean of a random sample of size n from an exponential population is a minimum variance unbi-ased estimator of the parameter θ.
A sample has a minimum value of 7 and a maximum value of 58 .Estimate its variance.
Let X1, X2,…. Xn be a random sample from Poisson distribution with parameter , obtain Cramer Rao lower bound for the variance of unbiased estimators of lamda
A survey found that 0.07% of the people in a city are infected by the COVID virus. If we randomly select 4500 people, using Poisson distribution (a) Find the probability that at most 3 people are infected by the virus. (b) Find the variance of the number of people infected by the virus.
Assume that the population consists of only these eleven data points for y and z. Construct one sample for y and one another sample for z by using 5 data points which gives the maximum variance.If you still have some time, you can add your reviews about the contribution of Bessel’s Correction to the variance. Why do we use such correction and can the variance of any possible sample be larger than the variance of the population?
Suppose two shots are fired at a target. Assume each shot hits withindependent normally distributed coordinates, with the same means and equal unit variances.a) Find the mean of the distance between the points where the two shots strike. (Hint: Youcan relate this problem to the Rayleigh distribution discussed in the lecture to make the finalcalculations easier!)b) Find the variance of the distance between the points where the two shots strike.
A new material is being tested for use in the manufacture of electrical conduit, to determine whether it will reduce the variance in crushing strength over the old material. Crushing strengths are measured for a sample of size 16 of the old material and a sample of size 20 of the new material. If it is shown that the crushing strength with the new material has smaller variance, the new material will be used.
A snack food manufacturer estimates that the variance of the number of grams of carbohydrates in servings of its tortilla chips is 1.141.14. A dietician is asked to test this claim and finds that a random sample of 2424 servings has a variance of 0.950.95. At alpha equals 0.10α=0.10, is there enough evidence to reject the manufacturer's claim? Assume the population is normally distributed.

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

b) The following table shows the time students from a college took to complete a marathon. Time (minutes) 30-32 33-37 38-44 45-47 Frequency 9. 14 3 a Frequency Density 3 4 b ii) iii) Calculate the mean time Calculate the mode iv) Calculate the variance