1.STATISTICAL INFERENCE 1) Let X₁, X₂, ..., X20 be a random sample from a population X with densityf(x;0) = {0* (1-(0*(1 − 0)¹−*, x = 0,1.otherwisewhere 0 < 0 ≤ is a parameter. The hypothesis Ho: 0 = to be tested againstH₁: p<1/1i) If Ho is rejected when X₁ ≤ 6. then what is the probability of type I error?ii) If Ho is rejected when Σ2₁ X₁ ≤ 6. then what is the probability of type I error?

X~Ber(θ) Farmula used nCr=r!/(n!(n-r)!) r!=r(r-1)x..3×2×1

Answered: 1) Let X₁, X₂,..., X20 be a random…

MATLAB: An Introduction with Applications

6th Edition

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Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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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
1 (a) Discuss the two expressions -x;- )² and E(x;- )², both of which are used (n-1) i=1 to measure the spread of a set of observations x1, x2, . .., X. (b) A random sample of n observations is taken from a distribution; the sum of the observations is t, and the sum of the squares of the observations is 12. Explain how to estimate the mean and the variance of the distribution from which the random sample was taken. (c) Given the random sample described in part (b), write down expressions (based on 11 and t2) for estimates of the mean and variance of the mean of a further, independent, random sample of size m , from the original distribution. (d) Given that n = 25, 1, = 400 and t2 = 8800, construct a 99% confidence interval for the mean of the distribution, and use it to test whether or not this mean could be 20.
4.2#12 Amwser question 12
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
Quantitative Research Statistical Data Analysis using Software ( SPSS / PLS - SEM ) 1 ) Study the provided videos on preparing and testing SPSS / PLS - SEM 2 ) Interpret the data which has been presented in the below Table 1 and Table 2
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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