User Account

All Pages

R programm, statistics, Basic Statistics

Assignment Help:
1. Generate a large dataset ( at least 1000 observations) µ with a known mean, µ between 20 and 40 and variance s = 9 using rnorm(). identify it as D. Use the functions mean() and var() to get the mean and vaiance of the sample.
2. Use t.test(D, mu=0) to check if the mean of your realizations, ¯x is signi?cantly
different from zero, from µ1, and from (µ0:1).
3. produce a histogram for D with vertical lines at the 0.25
th
and the 97.5
th
quantiles.
4. generate 10 samples of 20, S1 .....S10 with random means using S1<- rnorm(20,runif(1,min=0,max
= 80)), then calculate means and variances for each.
5. Use t.test(D, S1) to check if the sample means for S1 .....S10 are likely to have come
from the same population as the large distribution D. This Stat Trek webpage is a
good source. You should be using 2-tailed tests.
6. Explain the difference between a one-tailed test and a two-tailed test.
7. Create two variables, x and y, where y is a deterministic linear function of x. Show
the formula you used.
8. Generate a plot of y against x.
9. Calculate the correlation between y and x.covariance of y and x.
10. Create a new variable, yRan, that is like y except that it contains some random noise.
11. Calculate the correlation between yRan and x and the covariance of yRan and x.
12. Add more noise to yRan. Calculate the covariance of yRan and x and the Pearsonian correlation coef?cient. State how adding more noise affects the correlation
coef?cient.
13. Conduct the following experiment. Start with a deterministic function as in part 8
with a positive slope. Add some noise. Now systematically reduce the slope from
positive to negative, taking care to make quite a few observations near zero. Keep
the noise parameters constant. Make a table showing the slope vs the correlation
coef?cient.
14. Plot the slope vs the correlation coef?cient from the previous question and say what
you learn from the exercise.

Related Discussions:- R programm, statistics

Diagrammatic and graphic, #question.d.

#question.d.

Construct a cumulative relative frequency plot, Examine the distributions o...

Examine the distributions of weight and height. Are there any outliers? If so deal with them appropriately. Create a new variable that divides weight into groups. Produce a tabl

Number of faults to line length, A study on the occurrence of line faults i...

A study on the occurrence of line faults in an electricity supply network was carried out over a two-year period.  Data was collected from six regions on the number of faults per y

Analyze frequency distribution, how to find decile

how to find decile

Allowance for uncollectible , Allowance for uncollectible A contra-asset a...

Allowance for uncollectible A contra-asset assessment consideration used to indicate the part of a / r that is approximated to be uncollectible.

#tiMEDIANtle.., #quHOW TO MAKE ASSIGMENT ON MEDIANestion..

#quHOW TO MAKE ASSIGMENT ON MEDIANestion..

Project, impact of cost accounting technique in organizational performance

impact of cost accounting technique in organizational performance

Historigram and histogram, Ask quewhat is the difference between histotigra...

Ask quewhat is the difference between histotigrams and histograms?stion #Minimum 100 words accepted#

Time series, causes of each component

causes of each component

Barter system, Define the barter system with examples where payment is made...

Define the barter system with examples where payment is made in kind instead of cash. A barter system whereby the payment for purchases is made in kind instead of, in cash. i.e.

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd