please answer in text form and in proper format answer with must explanation , calculation for each part and steps clearly 51 pointDGiven that the number of data is large enough, the researcher can use thenormal distribution to determine whether to reject the null hypothesis ornot.The followings are the quantiles of the standard normal distribution:Quantiles.95.975.99.995N(0,1)1.64491.96002.32632.5758Then, with the t-statistic in the above problem, the researcher concludesthat the price of soda in Town A is 5% more expensive than Town B (at the5% significance level).TrueFalse

To determine the correctness of the researcher's conclusion that the price of soda in Town A is 5%…

Answered: 5 1 point D Given that the number of…

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

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The covariance by itself is not very useful because ___________.
An econometrics class has 80 students, and the mean student weight is145 lb. A random sample of 4 students is selected from the class, and theiraverage weight is calculated. Will the average weight of the students in thesample equal 145 lb? Why or why not? Use this example to explain whythe sample average, Y, is a random variable ?
Suppose you select a random sample of 16 students from a population that has mean of µ = 75 and standard deviation of ơ = 20. You want to know what would be considered a ‘typical’ sample mean for a sample of n = 16. To answer your question, you compute the two sample means that define the middle 95% of the distribution of sample means. Show your work, sketch the distribution, and shade in the area of interest. Hint: Sample means that are in the extreme 5% of the distribution (2.5% in each tail of the distribution) are considered ‘atypical’ or ‘extreme.’
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Let x be a random variable representing dividend yield of Australian bank stocks. We mayassume that x has a normal distribution with σ = 2.4%. A random sample of 15 Australianbank stocks has a sample mean of x = 6.83%. For the entire Australian stock market, themean dividend yield is μ = 6.9%. Do these data indicate that the dividend yield of allAustralian bank stocks is higher than 6.9%? Use α = 0.05. What is the value of the teststatistic?
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