Question

A graduate student conducted an experiment in which 24 ten-month-old babies were asked to watch a climber character attempt to ascend in 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 21 of the 24 cases, the baby chose the helper toy.

A. Why is it important to randomly expose the baby to the helper or hinderer toy first?

a. the randomness in the order or exposure is important to avoid bias.

b. the randomness in the order or exposure is important to make sure half the babies see the helper first and the other half see the hinderer first.

c. the randomness in the order or exposure is important to minimize the effect of the sample standard deviation.

d. the randomness in the order of exposure is important to satisfy the condition of using the binomial probability distribution.

B. What would be the appropriate null and alternative hypotheses if the researcher is attempting to show that babies prefer helpers over hinderes?

Answer 1

I think the correct answer from the choices listed above is option C. It is important to randomly expose the baby to the helper or hinderer toy first because the randomness in the order or exposure is important to minimize the effect of the sample standard deviation. Hope this answers the question.

Answer 2

Answer:

Option b is correct.

Step-by-step explanation:

Here we find that 24 ten month old babies were asked to watch a climber character attempt to ascend in hill. On two occasions, the baby witnesses the character fail to make the climb

Now children would be eager to see the end in the third attempt they either see a helper helping for success or a hinderer making failure.

Since children are divided into two groups one with either type of show

it is better to see that half children see the helper first and other half see the hinderer first

SO

option b is right answer