1.bSTATISTICAL INFERENCE Let X₁, X2, X3,..., X30 be a random sample of size 30 from a population distributed with thefollowing probability density function:f(x)=e 2, if 0 < x < ∞otherwise20,Suppose that Y =₁X₁. Usei) the Central Limit Theorem to compute P(40

The distribution of X is given by, f(x) = 12e-x2, if 0<x<∞0otherwise So, EXr =…

Answered: Let X₁, X2, X3,..., X30 be a random…

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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 Disease A was reported by local area hospitals in beginning in December 28, 1998.Initial symptoms were mainly bloody diarrhea, fever, weakness. Some later had fainting, hypotension.It was traced back to a potluck holiday party held in December 23 at a paper products sales company of 256 employees. All the employees attended that holiday party.One person died. The rest made full recoveries. No one who recovered from the illness showed any further symptoms. All data from the hospitals were compiled into the following chart: Date #cases Comment12/23/1998 0 Date of the holiday party.12/24/1998 0 12/25/1998 012/26/1998 012/27/1998 012/28/1998 212/29/1998 412/30/1998 812/31/1998 16 First patient in ICU for sepsis.1/01/1999 32 Second patient in ICU for sepsis.1/01/1999 30 The first patient expired in ICU.1/02/1999 26 The second patient transferred to regular ward.1/03/1999 18 The second patient discharged to home.1/04/1999 21/05/1999 01/06/1999 01/07/1999 0 21) What is the incubation period…
LICENSE x ED COURSE, PART 4 of 4. What is your statistical decision? The following 2 X 2 chart represents whether high school students passed the road test for their driver’s license on the first attempt by whether they took a driver’s education course. What is your statistical decision?
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Hypothesis Testing Question: Is there a statistically significant difference between the proportion of citizens in the United States and Japan without underlying health conditions who have been hospitalized after a COVID-19 diagnosis? The proportion of Americans and Japanese from nationally representative samples of adult citizens from each country who have been hospitalized for one or more days due to COVID-10 infection is reported below. Please include all steps of the five step model and write a sentence or two interpreting your results (use p= .01, Z(critical) = ± 2.58). Americans Japanese Ps1 = .07 Ps2 = .04 N1 = 1325 N2 = 1287
9. A student researcher is assigned the task of finding out if the level of education attained by a person depended on the income class to which he/she belonged. He interviews 60 persons. The results are recorded on the table below. Level of Income Bracket Education A в Attained High School 15 Graduate College Graduate With MA/PhD Degrees 2 10 3 4 5. The student applies a test of independence at 5% level. What is his conclusion?
Example: Independent t-Test ● A group of 30 people jump into the Atlantic. Their temperature is taken immediately when they get out of the water (mean = 96.3). At the same time, the temperatures of 30 random people waiting on the beach are also taken (mean = 98.4). Do the two groups significantly differ? ● a) What hypothesis test? ● b) Assumptions? (pretend they've all been met) c) Hypotheses? ● ● d) If SE= .6, what is the test statistic? ● e) df=?, Critical value=2.000 f) Conclusion? g) 95% Cl of the drop in temperature? ● ●
How do I tell if I have a one-sample t-test or an indepenent-samples t-test in the following situation? I have a group that has received a financial benefit and were chosen to rate their happiness after receiving that benefit. However, all members, those in the sample and those in the total group received the same beneifit. Do I have two groups and need an independent samples t-test or do I have one group measured against the mean?
Seniority and salary:|A personnel specialist with a large accounting firm is interested in determining the relationship between seniority and hourly wages for administrative assistants. She randomly selected 21 administrative assistants and records their years with the company and hourly wage. Seniorit 2 3 6 5 3 1 1 2 3 5 4 1 2 3 4 4 Wage 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 5 4 4 3 2 5 5 4 3 2 3 4 3 3 6. 5 Is seniority related to hourly wage? How does the specialist know? What hourly wage would the specialist predict for an administrative assistant with 3 years seniority? How would she make this prediction? H st
1
Cost of shopping Do consumers spend more on a trip toWalmart or Target? Suppose researchers interested in thisquestion collected a systematic sample from 85 Walmartcustomers and 80 Target customers by asking customersfor their purchase amount as they left the stores. The datacollected is summarized in the table below.To perform inference on these two samples, what condi-tions must be met? Are they? Explain. Walmart Targetn 85 80y $45 $53s $21 $19

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Let X₁, X2, X3,..., X30 be a random sample of size 30 from a population distributed with the following probability density function: f(x) = 2 (0, 2, if 0 < x < 00 otherwise Suppose that Y = ₁X₁. Use i) the Central Limit Theorem to compute P(40