Question 1: I. Describe two situations in which keyboard input might be preferred over speech for data entry.

II. What the different kinds of requirements? Give an example of each from Facebook application? III. In your opinion should anthropomorphism of robotic interfaces be encouraged or not? Give reasons. IV. Why should Likert-scale questions have an odd number of responses? Support you answer by an example?

V. Briefly discuss the following statement: People find it hard to learn by following instructions from a manual.

Question 6:

Given this Null hypothesis to be tested: "There is no difference between using mouse or keyboard in terms of data numeric entry speed." According to this hypothesis, write when Type I and Type II errors occur:

Question 7:

A Company has developed a new battery (called the Z battery). The engineer in charge claims that Z will operate continuously for at least 7 minutes longer than the old two batteries (X and Y) and produce less heat. To test his claims, the company selects a random sample of 100 new batteries (Z) and 200 old batteries (100 from X and another 100 from Y) and put them under the experiment. The experiment results show that the X batteries run continuously for 190 minutes, Y batteries run continuously for 195 minutes, and the new batteries Z for 200 minutes on average. In addition, the experiment results show that the old batteries (X and Y) generate 20 J/g/C of heat while the new batteries Z generate 22 J/g/C on average.

Answer the following:

a) Write the research null hypothesis:

b) How many independent variables do we want to investigate in the experiment?

c) How many dependent variables do we want to investigate in the experiment?

d) How many conditions in the experiment?

e) How many Subjects are involved in the experiment? f) What is the proper statistical test type to be used to analyze the data? g) Which of the following is more appropriate to be used to analyze the data and why? (Two-tailed or One-tailed)