If the TRUE variance of the sampling distribution was known, then itwould be appropriate to use a t- distribution to construct confidenceintervals for the mean.1YesNoA "statistically significant" result is one that is unlikely under assump-tions we made about the theoretical world.2True False3 Suppose that we are interested in testing the following hypotheses abouta proportion: Họ : p = 0.4 versus Ha : p < 0.4. Some data are collectedand the value of the test statistic is 1.2. Should the conclusion atYesNoa = 0.05 be to reject Ho?To construct an 80% confidence interval for a population proportionusing a random sample of size meeting the Success- Failure condition,you use the normal distribution table. Write the Z-value =45Anecdotal evidence is useful for statistical inference.TrueFalse6 Replication in the context of design of an experiment is ensuring thestudy can be repeated by other investigators.Blinding is the practice of making the assigned treatment unknown toexperimental units and/or the person administering the treatment.Two events A and B are independent if P(A|B) = P(B).True FalseTrue FalseTrueFalse9The t confidence interval for the true mean is robust to minor deviationsTrueFalsefrom the Normal distribution.Even if the null hypothesis were true, if you carry out a test repeatedly Truewith independent random samples of the same size, you will reject thenull hypothesis a x 100% (where a is the significance level) of the time.For the linear regression y =y increases by bị.12 If X is a random variable, then Var(X) is also a random variable.13 For proportions measured in two related groups, the formula for the95% confidence interval for p1 – p2 is ĝi – P2 ±1.96/14 The statement "The regression line passes through the point (7, g)always true.15 On 31 observational units you obtained measurements on a pair ofvariables X and Y. You fitted a linear regression model. To test ahypothesis on the slope (B1) of Y on X, you use a t-statistic whichfollows a t-distribution under Ho : B1 = 0. What is the degrees of10False11bo +b,log10(x) , if x is divided by 10, thenTrueFalseTrueFalseTrue Falsep1(1-p1)P2(1-p2)nin2isTrue Falsefreedom of this t-distribution?16 Suppose we flipped a beer cap 10, 000 times and observed that the red Trueside of the cap came up 5141 times. We can use a binomial model withn = 10,000 and p = 0.5141 to draw statistical inference as this is thetrue model for the flipping a beer cap experiment.False

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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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