How tall? The heights of young men follow a Normaldistribution with mean 69.3 inches and standard devia-tion 2.8 inches. The heights of young women followa Normal distribution with mean 64.5 inches andstandard deviation 2.5 inches. Suppose we select inde-pendent SRSs of 16 young men and 9 young womenand calculate the sample mean heights XM and xw.What is the shape of the sampling distribution ofXM - Xw? Why?Find the mean of the sampling distribution. Showyour work.Find the standard deviation of the sampling distribu-tion. Show your work.

It is given that: For the distribution of height (specified to be normally distributed) of men (in…

Answered: How tall? The heights of young men…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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33% of taxpayers with adjusted gross incomes between $30,000 and $60,000 itimized deductions on their federal income tax return. Mean amount of deductions for this population of taxpayers was $16,642. Standard Deviation =$2,380. Round to 2 zero's if required.What are Sampling distributions of x bar for itimized deductions for this population of taxpayers for each of the population of sample size :30,50,100,400? Expected value of x=$16,642 30=? 50=? 100=$238.00 400=$119.00
In an advertising campaign, a snack company claimed that every 18-ounce bag of its cookies contained at least 1000 chocolate chips. Two statisticians attempted to verify the claim. The accompanying data represent the number of chips in an 18-ounce bag of the company's cookies based on their study. Complete parts (a) through (e). Click here to view the chocolate chip data table. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). Chocolate Chip Data Table 1216 1216 1218 1267 1274 1278 1289 1290 1298 1310 1327 1092 1094 1151 1348 1169 1356 1106 1181 1358 1124 1127 1135 1136 1143 1190 1231 1378 1195 1205 1210 1215 1241 1243 1246 1253 1402 1415 1440 1516 Print Done
The number of years of education of self‑employed individuals in the United States has a population mean of 13.6 years and a population standard deviation of 3 years. If we survey a random sample of 100 self‑employed people to determine the average number of years of education for the sample, what is the standard deviation of the sampling distribution of ?¯x¯ , the sample mean? 13.6 years 0.3 years 3 years
Question 2 Suppose the true proportion of voters in the county who support a school levy is 0.57. Consider the sampling distribution for the proportion of supporters with sample size n = 122. What is the mean of this distribution? > What is the standard error (i.e. the standard deviation) of this sampling distribution, rounded to three decimal places? Submit Question
The times to pop a 3.4-ounce bag of microwave popcorn without burning it are Normally distributed with a mean time of 140 seconds and a standard deviation of 20 seconds. A random sample of four bags is selected and the mean time to pop the bags is recorded. Which of the following describes the sampling distribution of all possible samples of size four? approximately Normal with a mean of 70 seconds and a standard deviation of 5 seconds approximately Normal with a mean of 70 seconds and a standard deviation of 20 seconds approximately Normal with a mean of 140 seconds and a standard deviation of 20 seconds approximately Normal with a mean of 140 seconds and a standard deviation of 10 seconds
Suppose we want to know the mean number of shurikens thrown each night by ninjas in Konoha village. Getting this information from every ninja in the village would take forever. Instead, we randomly select 20 ninjas from the ninja school that is closest to us. a. Describe the statistic of interest in this survey b. The method used to obtain the sample of ninjas above is an example of which of the following (i) convenience sampling (ii) voluntary response sampling (iii) stratified random sample (iv) multi-stage sampling
What are the values for SS and variance for the following sample of n = 3 scores? Sample: 8, 5, 2
This assignment is worth 1 points. The extra point will be added to your overall course grade. For example: if you receive an 88% in the course you can receive up to 1 point giving you a new score of 89%. The following rubric will be used. 0.25 point for drawing the normal distribution curve with the mean value labeled on the curve and the appropriate area shaded. 0.25 point for determining the value of the standard deviation of the sample mean. 0.5 point for finding the correct probability. All work must be shown in order to receive any credit. Please upload your completed assignment here. The length of time taken on the SAT for a group of students is normally distributed with a mean of 2.5 hours and a standard deviation of 0.25 hours. A sample size of n = 60 is drawn randomly from the population. Find the probability that the sample mean is between two hours and three hours.
According to a survey in a country, 32% of adults do not own a credit card. Suppose a simple random sample of 600 adults is obtained. Complete parts (a) through (d) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) Describe the sampling distribution of p, the sample proportion of adults who do not own a credit card. Choose the phrase that best describes the shape of the sampling distribution of p below. O A. Not normal because n <0.05N and np(1 – p)< 10 GB. Approximately normal because n<0.05N and np(1 - p) 2 10 CC. Not normal because ns0.05N and np(1 - p) 2 10 D. Approximately normal because n<0.05N and np(1 - p)< 10 Determine the mean of the sampling distribution of p. (Round to two decimal places as needed.) p Enter your answer in the answer box and then click Check Answer. ? 6. parts remaining Clear All Check Answer
4. Sample Size. How does the sample size affect how close to normal a distribution of either sample means or sample pro- portions will be? What are the means and standard deviations of the distributions in each case? hp
Longevities of Archbishops and Monarchs 16 Archbishops 16 15 15 16 17 1 18 18 10 13 13 11 13 11 11 17 18 10 18 12 19 17 Monarchs 14 18 14 13 19 16 21 14 16 17 15 16
Suppose I want to sample the household incomes for EBR parish. Let's say I start with a simple random sample of 100 residents and calculate the sample mean. How would the sampling distribution of change if I increase the sample size to 1,000 residents?

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