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 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, thebaby 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 preventthe 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 thenplaced 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: p0.50.5 P-value =(Round to three decimal places as needed.)What is the correct conclusion regarding the null hypothesis?O A. Do not reject Ho. Although no level of significance is given, there is sufficient evidence to suggest the proportion of babies who choose the helper toy is greaterthan 0.5.B. Do not reject Ho. Although no level of significance is given, there is insufficient evidence to suggest the proportion of babies who choose the helper toy isgreater than 0.5.C. Reject Ho. Although no level of significance is given, there is sufficient evidence to suggest the proportion of babies who choose the helper toy is greater than0.5.O D. Reject Ho. Although no level of significance is given, there is insufficient evidence to suggest the proportion of babies who choose the helper toy is greater= Doctcenu

We have given that Sample size n =21 Favorable cases x =19 Sample proportion p^=x/n =19/21 =0.9048

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? O A. The randomness in the order of exposure is important to avoid bias. O B. The randomness in the order of exposure is important to minimize the effect of the sample standard deviation. O C. The randomness in the order of exposure is important to satisfy the conditions of using the binomial probability distribution. O 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 H1: p V0.5

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.5: Interpreting Data

Problem 1C