In an experiment 17 babies were asked to watch a climber attempt to ascend a NI. On two occasions. the bay witnesses the climber fal to make the climb. Then, the baby witnesses ether a helper toy push the otimber up the hit. 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 su 'prising action. and then the camber 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 ?linty approach the helper toy was 1.22 seconds with a standard deviaten of 1.52 seconds. Complete parts a through c.

(a) State the null and alternative hypotheses to determine if babies tend to look at the hinderer toy longer than the helper toy. Let pd phdde. where itireatt is the population mean time babies spend watching the ?Ember approach the hinderer toy and p,. is the population mean time babies spend ?totting the camber approach the he'per toy.

(b) Assuming the differences are normally distributed with no outliers. test if the difference in the amount of time the baby will watch the hinderer toy versus the help toy is greater than 0 at the 0.10 level of significance. Find the test statistic for this hypothesis test.

3.31 (Round to two decimal places as needed.)

Determine the R.value for this hypothesis test.

(Round to three decimal places as needed.)

OA. H: y = 0 H: #0 OD. H: 0 OE. H: Hy #0 H: y=0 ) C. Ho: Hy=0 H: 0 H: y=0