A random sample of monthly internet usage bills from three different telecommunicationproviders were collected among the university students at College H. The result as follow.ANOVAInternet UsageSum of SquaresdfMean SquareFSig.Between Groups1613.771R.069Within GroupsP12238.773Total4479.04214a) What are the TWO (2) main assumptions for the model above?b) Compute the values of P, Q, R and s.c) Using p-value approach, is there any evidence to indicate the mean internet usage billsamong the university students are different from the three telecommunication providers?Use a=0.05.

We need to answer given questions based on concept of ANOVA.

Answered: A random sample of monthly internet…

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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1) A cement producer, manufactures and then fills 40kg-bags of powder cement on twodistinct production tracks located in separate suburbs. To determine whether differencesexist between the average fill rates for the two tracks, a random sample of 25 bags fromTrack 1 and a random sample of 16 bags from Track 2 were recently selected. Each bag’sweight was measured and the following information measures from the samples arereported:Production ProductionTrack 1 Track 2n1 = 25 n2 = 16x2 = 40.02 x1 = 39.87 s1 = 0.59 s2 = 0.88 Supervision believes that the fill rates of the two tracks are normally distributed with equalvariances.Construct a 95% confidence interval estimate of the true mean difference between the twotracks.--------------------------------------------------------------------------------------------------------------2) Two independent simple random samples were selected from two normallydistributed populations with unequal variances yielded the following information:Sample 1…
Using all 1991 birth records in the computerized national birth certificate registry compiled by the National Center for Health Statistics (NCHS), statisticians Traci Clemons and Marcello Pagano found that the birth weights of babies in the United States are not symmetric ("Are babies normal?" The American Statistician, Nov 1999, 53:4). However, they also found that when infants born outside of the "typical" 37-43 weeks and infants born to mothers with a history of diabetes are excluded, the birth weights of the remaining infants do follow a Normal model with mean μ = 3432 g and standard deviation σ = 482 g. The following questions refer to infants born from 37 to 43 weeks whose mothers did not have a history of diabetes.
Using all 1991 birth records in the computerized national birth certificate registry compiled by the National Center for Health Statistics (NCHS), statisticians Traci Clemons and Marcello Pagano found that the birth weights of babies in the United States are not symmetric (\"Are babies normal?\" The American Statistician, Nov 1999, 53:4). However, they also found that when infants born outside of the \"typical\" 37-43 weeks and infants born to mothers with a history of diabetes are excluded, the birth weights of the remaining infants do follow a Normal model with mean μ = 3432 g and standard deviation σ = 482 g. The following questions refer to infants born from 37 to 43 weeks whose mothers did not have a history of diabetes. Compute the z-score of an infant who weighs 3762 g. (Round your answer to at least two decimal places.) Approximately what fraction of infants would you expect to have birth weights between 2890 g and 3410 g? (Express your answer as a decimal, not a percent, and…
Using all 1991 birth records in the computerized national birth certificate registry compiled by the National Center for Health Statistics (NCHS), statisticians Traci Clemons and Marcello Pagano found that the birth weights of babies in the United States are not symmetric ("Are babies normal?" The American Statistician, Nov 1999, 53:4). However, they also found that when infants born outside of the "typical" 37-43 weeks and infants born to mothers with a history of diabetes are excluded, the birth weights of the remaining infants do follow a Normal model with mean μ = 3402 g and standard deviation σ = 492 g. Let X be the weight of a randomly selected infant born from 37 to 43 weeks whose mother did not have a history of diabetes. What is the distribution of X? X ~ N (,) Please show the following answers to 4 decimal places. If a healthy infant is randomly chosen, find the probability that the birth weight is below 3156 g. If a healthy infant is randomly chosen, find the…
Using all 1991 birth records in the computerized national birth certificate registry compiled by the National Center for Health Statistics (NCHS), statisticians Traci Clemons and Marcello Pagano found that the birth weights of babies in the United States are not symmetric ("Are babies normal?" The American Statistician, Nov 1999, 53:4). However, they also found that when infants born outside of the "typical" 37-43 weeks and infants born to mothers with a history of diabetes are excluded, the birth weights of the remaining infants do follow a Normal model with mean μ = 3432 g and standard deviation σ = 482 g. The following questions refer to infants born from 37 to 43 weeks whose mothers did not have a history of diabetes.Compute the z-score of an infant who weighs 2903 g. (Round your answer to two decimal places.)−1.10Correct Approximately what fraction of infants would you expect to have birth weights between 3060 g and 4410 g? (Express your answer as a decimal, not a percent, and…
A student entering a doctoral program in educational psychology is required to select two courses from the list of courses provided as part of his or her program. (a) List all possible two-course selections. (b) Comment on the likelihood that EPR 679 and EPR 615 will be selected list: EPR 643, Nonparametric StatisticsEPR 658, Interpretive Methods in Educational ResearchEPR 679, Methods of Multivariate AnalysisEPR 604, Research in Child DevelopmentEPR 615, Theory of Measurement Select all the possible two-course selections below. A.658. 604 B.658, 679 C.679, 615 D.643, 679 E.658, 615 F.643, 604 G.643, 658 H.679, 696 I. 643, 643, 658 J. 643, 643 K. 604, 615 L. 679, 604 M. 615, 615 N. 643, 615
Based on a sample of n=26, the least-squares method was used to develop the prediction line Yi=6+3Xi. In addition, SYX=3.4, X=4, and ∑i=1nXi−X2=26. a. Construct a 95% confidence interval estimate of the population mean response for X=4 (Round to four decimal places as needed.)
Assuming the two sites are hydrologically well connected, the transit time between the two sites is fast, and the two sites cannot be treated as independent samples, what kind of t-test should be performed to show that the upslope site is greater than the downslope site? Enter the letter of your answer choice in the answer blank A. one-tailed unpaired t-testB. two-tailed unpaired t-testC. one-tailed paired t-testD. two-tailed paired t-test What is the calculated t statistic, rounded to 4 decimal places? Is the calculated t statistic greater or less than the critical t value reported by the data analysis tool pack? (enter greater or less) Is the nitrate concentration at the upslope site significantly greater than the downslope site? (Enteryes or no) Based on this statistical result, and assuming no diffusion or dilution occurs between the upslope and downslope site, do you think microbes are removing NO3- from the ground water? (Enter yes or no)
Based on a sample of n=25, the least-squares method was used to develop the prediction line Yi=8+3Xi. In addition, SYX=2.5, X=7, and ∑i=1nXi−X2=25. a. Construct a 90% confidence interval estimate of the population mean response for X=5. enter your response here≤μY|X=5≤enter your response here (Round to two decimal places as needed.)
A study was performed on 200 elementary school students to investigate whether regular Vitamin A supplementation was effective in preventing colds during the month of March. 100 were randomized to receive daily Vitamin A supplements during the month of March, and 100 students were randomized to a placebo group (and did not receive Vitamin A) during the same month. The number of students getting at least one cold in March was computed in the two groups, and the results are given in the following 2 X 2 table. Using a 5% level of significance determine whether there is an association between Vitamin A supplementation and prevention of Common Cold ColdNo Cold Vitamin A1585100 Placebo2575100 40160200
Based on a sample of n=25,mthe least-squares method was used to develop the prediction line Yi=6+2Xi. In addition, SYX=1.1, X=10, and ∑i=1nXi−X2=25. a. Construct a 95% confidence interval estimate of the population mean response for X=2. _______≤μY|X=2≤_____________ (Round to two decimal places as needed.)
Based on a sample of n=30,the least-squares method was used to develop the prediction line Yi=4+5Xi. In addition, SYX=3.2, X=7, and ∑i=1nXi−X2=30.Complete parts (a) and (b) below. a. Construct a 95% confidence interval estimate of the population mean response for X=3. ? ≤μY|X=3≤ ? (Round to four decimal places as needed.) b. Construct a 95% prediction interval of an individual response for X=3. ? ≤YX=3≤ ? (Round to four decimal places as needed.)

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