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

Differentiate between sample and population, Ask question #Midifferentiate ...

Ask question #Midifferentiate between sample and populationnimum 100 words accepted#

Histogram, difference betwen histogram and historigram

difference betwen histogram and historigram

6 accounting questions , I have 6 questions for my Accounting class that I ...

I have 6 questions for my Accounting class that I need help with. I only have two hours to complete them. I am trying to get an idea of what I can expect to pay for help with the a

General linear regression model, find the variance of least square estimato...

find the variance of least square estimator beta hat for general linear regression model

What is hurdle rate, What is hurdle rate? In investment spending budget...

What is hurdle rate? In investment spending budget, challenge amount is the minimal amount that an organization desires to earn when getting a venture. Hence the challenge amou

Calculate the monopoly profits and probability , Each firm in a competitive...

Each firm in a competitive research industry can undertake one project at a constant cost, f = $960 to try and develop a certain new product. The inverse demand curve for the new

How to solve accounting homework?, How to solve accounting homework?

How to solve accounting homework?

Worksheet assignment help, Worksheet 5 Q1: For this question, use the p...

Worksheet 5 Q1: For this question, use the petrol consumption data from Worksheet 4, (included the data for worksheet 4)   8.9   10.4    6.3   8.9   10.8   10.8   8.2

#title.regression., regression line drawn as y=c+1075x,when x was 2,and y w...

regression line drawn as y=c+1075x,when x was 2,and y was 239,given that y intercept was 11.calculate the residual

The correlation coefficient to identify collocations, Would there be a poss...

Would there be a possibility to use the correlation coefficient to identify collocations? Compare with the Chi2 test. • How could we maybe do that?

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