932152848557...x Chapter 7 Assign...X Chapter 8 Assigh..The data is as follows:Regular Diet No-Lecithin Dietn = 10n = 5M= 25M= 33SS = 250SS = 140%3Da. Is there a significant effect of lecithin on learningperformance? Test at a .05 level of significance.b. Estimate how much does lecithin affect learningperformance. Make a point estimate and an 95%confidence interval estimate of the population. 2. Recent studies have allowed psychologists to establishdefinite links between specific foods and specific brainfunctions. For example, lecithin has been shown to increasethe concentration of certain brain chemicals that helpregulate memory and motor coordination.An experiment was conducted that involves two separatesamples of newborn rats. The ten rats in the first sampleare given a diet with standard amounts of lecithin. The fiverats in the second sample are fed a special diet, whichcontains almost no lecithin. After 6 months, each rat istested on a specially designed learning problem thatrequires both memory and motor coordination. The scorefor each animal is the number of errors it made beforesolving the learning problem.

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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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You want to find out if developmental English courses had a positive affect on students' writing skills. You have a sample of 10 students do a writing sample the first day of class and on the last day of class. You want to determine if there is significant gains in writing ability at the 0.05 level.You believe the population of difference scores is normally distributed. You obtain the following sample of data: post-test pre-test 65.7 65.4 45.2 45.4 55 55.4 49 48.6 50.7 50.4 56 55.3 77.3 77.2 61.7 62 48.5 47.7 62.4 62 Use a 0.05 alpha level. What is the critical value for this test? (Report answer accurate to three decimal places.)critical value = What is the test statistic for this sample? (Report answer accurate to three decimal places.)test statistic =
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