Question

In an experiment 18 babies were asked to watch a climber attempt to ascend a hill On two occasions the baby witnesses the climber fail to make the climb. Then the baby witnesses either a helper toy push the climber up the hill, or a hinderer toy preventing the climber from making the ascent. The toys were shown to each baby in a random fashion. A second part of this experiment showed the climber approach the helper toy, which is not a surprising action, and then the climber approached the hinderer toy, which is a surprising action. The amount of time the baby watched the event was recorded. The mean difference in time spent watching the climber approach the hinderer toy versus watching the climber approach the helper toy was 1.16 seconds with a standard deviation of 1.83 seconds. Complete parts a through c. - -- O D. Reject Ho. There is not sufficient evidence at the a=0.01 level of significance to conclude that the difference is greater than 0. (c) What do you think the results of this experiment imply about babies' ability to assess surprising behavior? O A. There is not sufficient evidence that babies have the ability to assess surprising behavior. O B. There is not sufficient evidence that babies do not have the ability to assess surprising behavior O C. There is sufficient evidence that babies have the ability to assess surprising behavior. O D. The experiment does not imply anything about babies' ability to assess surprising behavior. O E. There is sufficient evidence that babies do not have the ability to assess surprising behavior, Click to select your answer(s). Save for Later

part C

Answer 1

C. Here the test statistic is:

Thus the p-value is 0.0078 which is less than the significance level =0.01 hence we reject H_o. Thus the correct answer is option E.

mean diff.* 1.16 18 T = " = 2.689, the test statistic follows a t- distribution with 19 degree of freedom under Ho.

Please let me know if you have any doubts regarding the solution by commenting below.

You can give a thumbs up if you like the work.