Question
In: Statistics and Probability
1. Use R Studio: Include R Code A survey is taken of 250 students, and a...
1. Use R Studio: Include R Code A survey is taken of 250 students, and a phat of 0.48 is found. The same survey is repeated with 1000 students, and the same phat value is found. Compare the two 95% confidence intervals. What is the relationship between them? Is the margin of error for the second one four times smaller? If not, how much smaller is it?
Solutions
orchestra answered 2 years agoRelated Solutions
1. Basic use of R/R Studio. Solve the following problem in R and print out the...
1. Basic use of R/R Studio. Solve the following problem
in R and print out the commands and outputs.
(a) Create a vector of the positive odd integers less than 100;
Remove the values greater than 60 and less than 80; Find the
variance of the remaining set of values
(b) What’s the difference in output between the commands 2*1:5
and (2*1):5? Why is there a difference?
(c) If you wanted to enter the odd numbers from 1 to 19...
Using R Studio Use the two iid samples. (You can copy and paste the code into...
Using R Studio
Use the two iid samples. (You can copy and paste the code into
R). They both come from the same normal distribution.
X = c(-0.06, 1.930, 0.608 -0.133,0.657, -1.284, 0.166, 0.963,
0.719, -0.896)
Y = c(0.396, 0.687, 0.809, 0.939, -0.381, -0.042, -1.529,
-0.543, 0.758, -2.574, -0.160, -0.713, 0.311, -0.515, -2.332,
-0.844, -0.942, 0.053, 0.066, 0.942, -0.861, -0.186, -0.947,
-0.110, 0.634, 2.357, 0.201, -0.428, -1.661, 0.395)
(a) Report 95% confidence interval for the mean of X. Should we...
Use R studio to do it I need the code, thx. Write your own function, called...
Use R studio to do it I need the code, thx.
Write your own function, called go_mean(). The user will provide
a vector and the number of repetitions for the simulation. Your
function should:
- Create an empty vector
- Draw a sample the same size as the vector, selecting from the
vector itself, with replacement. - Compute the mean of the vector,
and store it in the empty vector.
- Repeat the steps above n times.
- Compute an...
In R/ R Studio, what code would I enter to find the answers to these questions?...
In R/ R Studio, what code would I enter to find the answers to
these questions?
What is the code to find the descriptive/ summary statistics of
all variables in a data set and how do i find the mean values?
What is the code to measure the skewness measure of delta time
for all of all the values in the data set?
What is the code to draw a histogram and q-q plot of the natural
log of a...
Use R to complete the following questions. You should include your R code, output and plots...
Use R to complete the following questions. You should include
your R code, output and plots in your answer.
1. Two methods of generating a standard normal random variable
are:
a. Take the sum of 5 uniform (0,1) random numbers and scale to
have mean 0 and standard deviation 1. (Use the properties of the
uniform distribution to determine the required transformation).
b. Generate a standard uniform and then apply inverse cdf
function to obtain a normal random variate (Hint:...
Use R to complete the following questions. You should include your R code, output and plots...
Use R to complete the following questions. You should include
your R code, output and plots in your answer.
1. Two methods of generating a standard normal random variable
are:
a. Take the sum of 5 uniform (0,1) random numbers and scale to
have mean 0 and standard deviation 1. (Use the properties of the
uniform distribution to determine the required transformation).
b. Generate a standard uniform and then apply inverse cdf
function to obtain a normal random variate (Hint:...
Use R to complete the following questions. You should include your R code, output and plots...
Use R to complete the following questions. You should include
your R code, output and plots in your answer.
Two methods of generating a standard normal random variable
are:
a. Take the sum of 5 uniform (0,1) random numbers and scale to
have mean 0 and standard deviation 1. (Use the properties of the
uniform distribution to determine the required
transformation).
b. Generate a standard uniform and then apply inverse cdf
function to obtain a normal random variate (Hint: use...
THIS QUESTION REQUIRES THE USE OF R STUDIO. ANY ANSWERS GIVEN THAT ARE NOT IN R...
THIS QUESTION REQUIRES THE USE OF R STUDIO. ANY ANSWERS GIVEN
THAT ARE NOT IN R STUDIO CODE WILL NOT SUFFICE. SOLVING WITHOUT THE
USE OF R STUDIO IS NOT ACCEPTABLE.
The previous question was:
Annual salaries for a large company are approximately normally
distributed with a mean of 49000 dollars and a standard deviation
of 2000 dollars. One manager claims that all of his direct reports
are paid "above the 75th percentile" for the company. What is the
minimum...
How do I do this in R Studio? 1 Students who performed poorly on a City...
How do I do this in R Studio?
1 Students who performed poorly on a City of New York Skills
Assessment Test were enrolled in a summer math program. Scores of
10 students before and after the summer program were recorded.
They were:
Before = 18,18,21,18,18,20,23,23,21,17
After = 24,25,33,29,33,36,34,36,34,27
(Scores for individual students are in the same order in each
list.) Did the NYC summer math program improve student performance
significantly?
8. How many points did student scores improve on...
A college administrator wants to survey 250 students that attend her college to see if students...
A college administrator wants to survey 250 students that attend
her college to see if students are satisfied with the course
offerings. Match the strategies to their corresponding sampling
techniques. The administrator stands by the front door of the
admissions department and asks the first 250 students who walk in.
The administrator researches the ethnic make-up of the college and
makes sure that the proportion of each ethnic group represented in
the sample is the same as the corresponding proportion...
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