Download CIS 464 Quiz 1 Sample

CIS 464 Quiz 1 - Sample
Fall 2005 Course Pack pp: 1-45
Athappilly
Max. Points 50
Name: ____________________, __________________
(Last, First)
SS#:______________
(Last 4 Digits)
Choose the Best Answer
1. Business intelligence is an answer to the _____________’ timely and pertinent
information demands
a. Technocrats
b. Senior Executives*
c. Supervisors
d. Blue collar workers
2. The most basic element of a business intelligence architecture is:
a. A reporting engine
b. Scheduling facility
c. Data accessing method
d. A common suite of interfaces
3. The immediate intended result of data mining is:
a. Decision making
b. Discovery of knowledge*
c. Data base queries
d. Information processing
--------------------------------------------------------------------------------------------------------Figure 1: A gains-curve showing the result of a mail survey.
“can hit 80% of buyers from 35% of mailing
Y
100
P
50
X
0
35
50
100
X => cumulative % of customers.
Y => cumulative % responded positively.
Diagonal OP => expected cumulative % positive responders.
4. The gains curve indicates that:
a. The gains from 35% of the sampling will be negative customer responses.
b. The gains from 80% of the sampling will be positive customer responses.
c. The gains from 80% of sampling are 35% positive customer responses.
d. The gains from 35% of sampling are 80% positive customer responses.
5. The first phase of CRISP- Strategy for data mining is:
a. data understanding
b. data preparation
c. business understanding*
d. modeling
6.
Understanding the data source, variables and the characteristics of the variables
belongs to ________ of CRISP model.
a. data understanding*
b. data preparation
c. business understanding
d. modeling
7. Evaluating results, reviewing the data mining process, and determining the next steps
belongs to ________ of CRISP model.
a. modeling
b. data preparation
c. evaluation*
d. deployment
8. Main branches of statistics include:
a. descriptive, analytical, and inferential
b. descriptive, analytical, and design and analysis of experiments
c. descriptive, categorical, and inferential
d. descriptive, inferential, and design and analysis of experiments*
9.
This particular branch of statistics deals with the study sample data in order to infer
characteristics of the population
a. inferential*
b. analytical
c. descriptive
d. design and analysis of experiments
10. The four elements of statistics does NOT include:
a. population
b. sample
c. tabulation*
d. measures for the reliability of the inferences
11. Measurement scales for statistics are broadly divided into four. They are:
a. nominal, ordinal, interval, and ratio*
b. nominal, demographic, interval, and ratio
c. nominal, ordinal, continuous, and ratio
d. nominal, ordinal, interval, and graphical
12. The numbers in this _________ measurement scale indicates that they are different
and not greater or smaller
a. Nominal*
b. ordinal
c. continuous
d. ratio
13. Equal numbers reflecting equal differences in the amounts of the attributes are
measured in _______ scale.
a. nominal
b. ordinal
c. interval*
d. ratio
14. Sum of the probabilities of an event must be:
a. 100%*
b. less than 1
c. greater than 1
d. not equal to one.
15. While stating hypotheses for statistical research on the effectiveness of drug A and
drug B, the null hypothesis may be written as:
a. there is no difference between the null and alternate hypotheses
b. there is a difference between the null and alternate hypotheses
c. there is a difference between the effectiveness of drug A and Drug B
d. there is no difference between the effectiveness of drug A and Drug B*
16. In the case of a 2 test for instance, if the value of 2Computed > 2Table at  = 0.05,
then
a. we reject the Null Hypothesis at 95% confidence level.*
b. we accept the Null Hypothesis at 95% confidence level.
c. we reject the Null Hypothesis at 5% confidence level.
d. we accept the Null Hypothesis at 5% confidence level.
17. If the population mean is 100 and the population standard deviation is 25, then the
standard deviation of the sampling distribution of 625 cases is:
a. 1*
b. 9
c. 4
d. 3
--------------------------------------------------------------------------------------------------------Figure 3: Crosstabulation of POLVIEWS and CLASS
with Row Percentages Added
18. From Figure 3, we infer that conservative consider themselves to be middle or upper
class
a. 33.7%
b. 62.7%*
c. 3.6%
d. 100%
19. From Figure 3, we see that liberals constitute ________ percentage of the total
sample size
a. 6.1
b. 43.5
c. 50.4
d. 23.9*
Figure 4: The Chi-Square Tests Window for the variables in Figure 3
-----------------------------------------------------------------------------------------------------------20. The Pearson chi-square value 0.008 in Figure 4 indicates that the prediction about the
relationship between variables given in Figure 3 is wrong
a. 0.8% of the times*
b. 8% of the times
c. 80% of the times
d. 99.2% of the times
21. Find the total area from the Z-chart for P(Z> -0.48)
a. 0.3106
b. –0. 3106
c. 0.8106*
d. -0.8106
22. If the mean and standard deviation of a normal distribution are zero and one, that
distribution is called:
a. Perfect normal distribution
b. Abnormal distribution
c. Standard normal distribution*
d. Small normal distribution
23. For this question, find the values form the Table up to second decimal by rounding).
For a normal distribution of hourly rates with mean = $50 and SD = $8 what percentage
of people earn salary between $45 and $65 ?
a. 25
b. 47
c. 71*
d. 54
24. For a normal distribution of hourly rates with a mean = $50 and SD = $15 what
percentage of the employees will receive an hourly salary less than $65?
a. 95
b. 99
c. 68*
d. 34
25. In a Normal Distribution the values of the three statistical measures, namely, ---------------------- are the same.
a. Mean, range, mode
b. Mean, standard deviation and variance
c. Mean, standard deviation and median
d. Mean, mode, and median*