A graduate student conducted an experiment in which 21 ten-month-old babies were asked to watch a climber character attempt to ascend a hill. On two occasions, the baby witnesses the character fail to make the climb. On the third attempt, the baby witnesses either a helper toy push the character up the hill or a hinderer toy prevent the character from making the ascent. The helper and hinderer toys were shown to each baby in a random fashion for a fixed amount of time. The baby was then placed in front of each toy and allowed to choose which toy he or she wished to play with. In 19 of the 21 cases, the baby chose the helper toy. Complete parts (a) through (d) below. (a) Why is it important to randomly expose the baby to the helper or hinderer toy first? A. The randomness in the order of exposure is important to avoid bias. B. The randomness in the order of exposure is important to minimize the effect of the sample standard deviation. C. The randomness in the order of exposure is important to satisfy the conditions of using the binomial probability distribution. D. The randomness in the order of exposure is important to make sure half the babies see the helper first and the other half see the hinderer first. (b) What would be the appropriate null and alternative hypotheses if the researcher is attempting to show that babies prefer helpers over hinderers? Ho:P V0.5 H,: p 0.5 O O

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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A graduate student conducted an experiment in which 21 ten-month-old babies were asked to watch a climber character attempt to ascend a hill. On two occasions, the baby witnesses the character fail to make the climb. On the third attempt, the baby witnesses either a helper toy push the character up the hill or a hinderer toy prevent the character from making the ascent. The helper and hinderer toys were shown to each baby in a random fashion for a fixed amount of time. The baby was then placed in front of each toy and allowed to choose which toy he or she wished to play with. In 19 of the 21 cases, the baby chose the helper toy. Complete parts (a) through (d) below.