6. Step 1: A developer of a virtual-reality (VR) teaching tool for the deaf want

Question

6.
Step 1:
A developer of a virtual-reality (VR) teaching tool for the deaf wants to compare the effectiveness of different navigation methods.
A total of 40 children were available for the experiment, of which equal numbers were randomly assigned to use a joystick, wand, dancemat, or gesture-based pinch gloves. The time (in seconds) to complete a designed VR path is recorded for each child.
State whether the following statement is True or False:
The response variable is the time to complete a VR path and the populations are children using different navigation methods.


True False


Step 2:
For each of the following situations, identify the response variable and the populations to be compared, and give , , and .

Give , , and .

Fill in the blanks:
(Give your answers as whole numbers.)

1) _______ .
2) _______ .
3) _______ .
4) _______ .
5) _______ .
6) _______ .

Answer 1
Answer 2
Answer 3
Answer 4
Answer 5
Answer 6



Step 3:
To study the effects of pesticides on birds, an experimenter randomly (and equally) allocated 65 chicks to five diets (a control and four with a different pesticide included).
After a month, the calcium content (milligrams) in a 1-centimeter length of bone from each chick was measured.
State whether the following statement is True or False:
The response variable is the effect of pesticides on birds and the populations are the five diets. True False


Step 4:
For each of the following situations, identify the response variable and the populations to be compared, and give , , and .

Give , , and .

Fill in the blanks:
(Give your answers as whole numbers.)

1) _______ .
2) _______ .
3) _______ .
4) _______ .
5) _______ .
6) _______ .
7) _______ .

Answer 1
Answer 2
Answer 3
Answer 4
Answer 5
Answer 6
Answer 7



Step 5:
A university sandwich shop wants to compare the effects of providing free food with a sandwich order on sales.
The experiment will be conducted from 11:00 A.M. to 2:00 P.M. for the next 20 weekdays. On each day, customers will be offered one of the following: a free drink, free chips, a free cookie, or nothing. Each option will be offered 5 times.
State whether the following statement is True or False:
The response variable is the total sales between 11:00 A.M. and 2:00 P.M., and the populations are consumers responding to one of four sample offers. True False


Step 6:
For each of the following situations, identify the response variable and the populations to be compared, and give , , and .

Give , , and .

Fill in the blanks:
(Give your answers as whole numbers.)

1) _______ .
2) _______ .
3) _______ .
4) _______ .
5) _______ .
6) _______ .

Explanation / Answer

6 Step I TRUE Step II N =40, ni = 4, I = 10 Step III TRUE Step 4 I = 13 N=65 n1=n2=n3=n4=n5 = 13 Step 5 TRUE Step 6 I=4, N = 20, n1-n2=n3=n4 = 5

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