As an example of a situation in which several different statistics could reasonably be used to calculate a point estimate, consider a population of N invoices. Associated with each invoice is its "book value," the recorded amount of that invoice. Let T denote the total book value, a known amount. Some of these book values are erroneous. An audit will be carried out by randomly selecting n invoices anddetermining the audited (correct) value for each one. Suppose that the sample gives the following results (in dollars).LetBook valueAudited valueErrorInvoice1234 5288 709 527 207 147288 508 527 207 1650201 0 0 -18Y = sample mean book valueX = sample mean audited valueD = sample mean errorPropose a statistic for estimating the total audited (i.e., correct) value involving just N and X.XINNXPropose a statistic for estimating the total audited (i.e., correct) value involving T, N, and D.O TNDⒸT - NDOT.N/DOT+NDPropose a statistic for estimating the total audited (i.e., correct) value involving T and X / Y.ⒸT.X/Y01-T-X/YOT+X/YOT-X/YIf N = 5000 and T = 1,761,700, calculate the corresponding point estimates. (Round your answers to the nearest whole number.)based on just N and X $based on T, N, and D$based on T and X/Y$Need Help?Read It

Invoice12345Book value288709527207147Audited value288508527207165Error020100-18Let, be the sample…

Answered: As an example of a situation in which…

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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The General Social Survey is an annual survey given to a random selection of about 1500 adults in the United States. Among the many questions asked are "What is the highest level of education you've completed?" and "If you're employed full-time, how many hours do you spend working at your job during a typical week?" In a recent year, 1116 respondents answered both questions. The summary statistics are given in the chart below. (The sample data consist of the times, in hours per week, that were given by the respondents.) Sample Sample Sample Groups size mean variance Less than 281 41.6 115.8 h.s. High school 260 43.3 96.3 Bachelor's 294 42.5 100.5 Graduate 281 44.2 108.2 Send data to Excel Based on these summary statistics, we perform a one-way, independent-samples ANOVA test to determine if there is a difference in the mean hours worked in a typical week among the four populations of workers. (a) The results of this ANOVA are given in the incomplete ANOVA table below. Complete the…
We asked UST employees to tell us how many megabytes of memory (RAM) they have on their computer. We would like to test to see if the mean amount of memory is the same for three different academic departments. We have the memory amounts for six faculty members' machines in the three departments shown below. Dept. 1 Dept. 2 Dept. 3 1 2048 4096 4096 2 1024 2048 4096 3 1024 2048 8192 computer 4 2048 4096 8192 5 1024 2048 4096 6 2048 8192 2048 Here is the ANOVA table: Source DF Adj SS Adj MS F-Value P-Value Factor x 39263346 19631673 x.xx 0.025 Error xx 61691221 4112748 Total xx…
There are 15 numbers on a list, and the smallest number is changed from 4 to 0.4.a) Is it possible to determine by how much the mean changes? If so, by how much does it change?b) Is it possible to determine the value of the mean after the change? If so, what is the value?c) Is it possible to determine by how much the median changes? If so, by how much does it change?d) Is it possible to determine by how much the standard deviation changes? If so, by how much does it change
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We asked UST employees to tell us how many megabytes of memory (RAM) they have on their computer. We would like to test to see if the mean amount of memory is the same for three different academic departments. We have the memory amounts for six faculty members' machines in the three departments shown below. Dept. 1 Dept. 2 Dept.3 1 2048 4096 4096 1024 2048 4096 3. 1024 2048 8192 computer 4 2048 4096 8192 1024 2048 4096 2048 8192 2048 Here is the ANOVA table: Source DF Adj SS Adj MS F-Value P-Value Factor x 39263346 19631673 x.xX 0.025 Error xx 61691221 4112748 Total XX 100954567 After ANOVA, assume that we want to do all of the pairwise comparisons between the means in this case. Tukey Pairwise Comparisons: Grouping Information Using the Tukey Method and
Suppose an internet marketing company wants to determine the current percentage of customers who click on ads on their smartphones. How many customers should the company survey in order to be 90% confident that the estimated proportion is within 2 percentage points of the true population proportion of customers who click on ads on their smartphones?

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