To study the effects of prenatal cocaine use on infants, on collects a random sample of 65 weights of babies born to cocaine users that gives a mean of 2750 g and a standard deviation of 680 g. Use a 5% significance level to test the claim that weights of babies born to cocaine users have a mean that is less than 2900 g. Which one of the following is true? Select one: O a. The test statistic is -1.78 and the critical value is -1.64, hence we reject the null hypothesis. b. The test statistic is -1.96 and the critical value is -1.78, hence we reject the null hypothesis. O c. The test statistic is -1.64 and the critical value is -1.78, hence we fail to reject the null hypothesis. O d. None of the other answers in necessary true. e. The test statistic is -1.78 and the critical value is -1.96, hence we fail to reject the null hypothesis.

To study the effects of prenatal cocaine use on infants, on collects a random sample of 65 weights of babies born to cocaine users that gives a mean of 2750 g and a standard deviation of 680 g. Use a 5% significance level to test the claim that weights of babies born to cocaine users have a mean that is less than 2900 g. Which one of the following is true? Select one: O a. The test statistic is -1.78 and the critical value is -1.64, hence we reject the null hypothesis. b. The test statistic is -1.96 and the critical value is -1.78, hence we reject the null hypothesis. O c. The test statistic is -1.64 and the critical value is -1.78, hence we fail to reject the null hypothesis. O d. None of the other answers in necessary true. e. The test statistic is -1.78 and the critical value is -1.96, hence we fail to reject the null hypothesis.

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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