Question: Please round to 3 decimal points A population has a standard deviation of 34. We take a random sample of size 30 from this population.

Please round to 3 decimal points

A population has a standard deviation of 34. We take a random sample of size 30 from this population. Let Xbar be the sample mean and let Xtot be the sample sum of our sample. These are random variables. a) What is the variance of this population? b) What is the variance of Xtot? (to three decimal places) c) What is the standard deviation of Xtot? (to three decimal places) d) What is the variance of Xbar? (to three decimal places) e) What is the standard deviation of Xbar? (to three decimal places) f) What is the smallest sample size, n, which will make the standard deviation of Xtot at least 900? g) What is the smallest size sample, n, which will make the variance of Xtot at least 90000? h) Copy your R script for the above into the text box here

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

Round to 4 decimal places: The population mean and standard deviation are given below. Find the required probability and determine whether the given sample mean would be considered unusual. For a...

Please help with these few questions Question 3 (2 points) The population mean and standard deviation for a process for which we have a substantial history are 120 and 1.77, respectively. For the...

Question 3 (2 points) The population mean and standard deviation for a process for which we have a substantial history are 120 and 13.34, respectively. For the variable control chart, a sample size...

Question 3 (2 points) The population mean and standard deviation for a process for which we have a substantial history are 120 and 8.60, respectively. For the variable control chart, a sample size of...

Question 3 (2 points) The population mean and standard deviation for a process for which we have a substantial history are 120 and 2.80, respectively. For the variable control chart, a sample size of...

Set Week 3: Chapters 3 & 4 Chapter 3: Complete the EVEN numbers problems listed below; the problem set begins on page 100 in Gravetter and Wallnau (2013). The answers to the odd numbered problems are...

QUESTION 1 The weight of the contents ofa can of Campbell's minestrone soup can be modelled by a normal distribution with a mean of 439.9 grams and a standard deviation of 3.2 grams. A random sample...

Need help with screenshots 1 through 7. All information needed can be found below. Note: Each screenshot includes an example (reference), the reason for this is because each screenshot includes...

Instructions for Students: Answer ONLY part a in Question 4. Questions carry equal marks. You have to show the work to earn marks. Answers must be uploaded on Moodle under Assignment II. Unless...

A population has a standard deviation of 97. We take a random sample of size 26 from this population. Let Xbar be the sample mean and let Xtot be the sample sum of our sample. These are random...

1. Prepare the 2018 statement of cash flows, formatting operating activities by the indirect method. (Use a minus sign or parentheses for amounts that result in a decrease in cash. If a box is not...

Why do retailers want to determine the lifetime value of their customers?

3. LO.2 Kelly, a U.S. citizen, earns interest income that is sourced in Germany. How could a U.S. tax treaty with Germany reduce Kellys taxes on the interest?

subject : negotiation and conflict management please answer to section A and B SECTION A (20 MARKS) There are THREE (3) questions in this section. Answer ALL questions in the Answer Booklet. 1. a) b)...

1. To understand the impression you want the other or the others to have of yourself.

4. Imagine an everyday task that you find difficult or troublesome to perform. Think through the entire sequence of activities with this everyday task. How do you go about making this a success? How...

2. Imagine a real event that was problematic in your past. What images, sounds, emotions, smells and tastes appear? Try to imagine a movie clip of this inci-dent, as it could unfold if the...