In an experiment investigating flight response in horses, two stimuli are presen

Question

In an experiment investigating flight response in horses, two stimuli are presented and distance (in meters) the horse travels away before it turns back toward the stimulus is recorded. The following results are obtained: a. Why are these matched-pairs data? b. In this experiment, the stimulus the horse was first exposed to (umbrella or fire extinguisher) was randomly selected. Why would this be a good idea? What might happen if this was not done? c. Is flight distance significantly different between the two stimuli at the alpha = 0.01 level?|

Explanation / Answer

Sol:

A)Since there are two conditions to which the horses are put to. A matched pairs design is a special case of a randomized block design. It can be used when the experiment has only two treatment conditions and subjects can be grouped into pairs, based on some blocking variable. Then, within each pair, subjects are randomly assigned to different treatments.

B)It has to be randomly selected to remove any baised data and so the horse will be equally exposed to both conditions first. If it was not done there would be a certian baised to data.

C)

I will be using excel to do the t test. The formulas can be used alternatively and checked.

The null hypothesis is accepted and we can say there is no difference between the two stimuli.

t-Test: Two-Sample Assuming Equal Variances Umbrella Fire Extinguisher Mean 5.517142857 6.92 Variance 3.667457143 7.303466667 Observations 7 7 Pooled Variance 5.485461905 Hypothesized Mean Difference 0 df 12 t Stat -1.120574843 P(T<=t) one-tail 0.142197247 t Critical one-tail 2.680997993 P(T<=t) two-tail 0.284394495 t Critical two-tail 3.054539589

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.