Research I 3rd Periodical Test

Use these choices to answer numbers 1-13: A. Mean   B. Median   C. Mode  D. Standard deviation E. Range

1.  _____ is the sum of all the given values divided by the number of values.
2.  _____refers to the value of the middle observation in an ordered distribution.
3. The ____ is the item in a distribution with the highest frequency or most number of cases.
4. The ___ refers to the difference of the highest and the lowest score.
5. The ____ is the most commonly used measure of dispersion.
6. The ____ is for interval and ration measurements.
7. The ___ is for ordinal or ranked measurements.
8. The ____ is for nominal or categorical data
9. The most widely used average.
10. The ____ is easily affected by extremely large or small values.
11. The ____ is easily affected by the number of items in a distribution.
12. The ___ is difficult to determine if the given values are not arranged according to magnitude.
13. The ____ is rarely used since it does not always exist.

Answers:

1. A
2. B
3. C
4. E
5. D
6. A
7. B
8. C
9. A
10. A
11. B
12. B
13. C
    

Use data and choices below to answer numbers 15-18.
Data: Ages of students 18, 14, 20, 20 Choices: A. 2  B. 18  C. 19  D. 20
_____14. Mean   _____15. Median   _____16. Mode  _____17. Standard Deviation
Ans. 14. B       15. C      16. D      17. A

II. Problem Solving
18-22 Workers A and B opened a  savings account . Worker A deposit the money an average of $7000 with a standard deviation of 8000 per month while Worker B deposits an average of $6500 with a standard deviation of 10000 per month. Who is the worker with a stable savings?

Xa= Std. dev./ average*100 = 8000/7000*100= 114%
Xb= Std. dev./average*100= 10000/6500*100= 154 %

Therefore worker A has a stable savings than worker B.

21-32. Repeated sampling procedures were conducted to determine the number of defective bulbs manufactured by a certain company. From the sampling results, determine the spread of the bulbs produced from the average defective bulbs by means of standard deviation.

Bonus but the answer is 162.65

33-44. Determine the value of the following:

1. Q1= _____
   
2. P36= ____
3. D5= _____
4. D4=_____
5. P55= _____
6. D7= _____
7. P79= _____
8. Q4= _____
9. Q2=_____
10. D3= _____

answers:

1. 25
2. 36
3. 50
4. 40
5. 55
6. 70
7. 79
8. 100
9. 50
10. 30

45-50. How many 4 digits numbers can be made using the four digits 2,3,4,5 when
a. repetitions are not allowed.
b. repetitions are allowed.

ans.
a. 4x3x2x1= 24
b. 4x4x4x4= 256