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

Homework, Can I get help with statistics?

Can I get help with statistics?

Incomplete accounts, HOW TO PREPARE INCOMPLETE ACCOUNTS CORRECTLY?

HOW TO PREPARE INCOMPLETE ACCOUNTS CORRECTLY?

A m, what is the relationship between the variance and the standard deviati...

what is the relationship between the variance and the standard deviation?

Calculate the predicted mean temperature, The following are actual data sho...

The following are actual data showing the latitude of a sample of major cities in the northern hemisphere and their mean high annual temperature. latitude(X)    mean high temp(Y

Authorized travel period , Authorized travel period Then period when the ...

Authorized travel period Then period when the visitor is in authorized travel position away from the established stop and established property. Talk about OFFICIAL STATION, OFFIC

#titlelinear regression.., regression line drawn asY=C+1075x,when x was 2,a...

regression line drawn asY=C+1075x,when x was 2,and y was239,given that y intercept was11.calculate the residual.

Computing observed probability values , For an alignment shown below derive...

For an alignment shown below derive log-odds score for the column 1 only by a)  Computing observed probability values b)  Expected probability values TAGCTT AAGCTC T

Structural analysis and probability , 1.) Consider two chains R and S, each...

1.) Consider two chains R and S, each having 3 and 6 links respectively. Each link's resisting strength is normally distributed with a mean of 60,000 psi and standard deviation of

Momentum and energy, Momentum and Energy Statement 1: If there is a defin...

Momentum and Energy Statement 1: If there is a definite force there is a definite displacement, which means that work is done definitely by the force. And Statement 2: The wor

Statistics, example of descriptive and inferential statistics?

example of descriptive and inferential statistics?

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