WorksheetsWeek 14_Statistics for Real Estate
Total questions: 40
Worksheet time: 3hrs 20mins
1) Simple random sampling..........
every member of the population has an equal chance of being selected.
every member of the population is listed with a number, but instead of randomly generating numbers, individuals are chosen at regular intervals.
precise conclusions by ensuring that every subgroup is properly represented in the sample.
also involves dividing the population into subgroups, but each subgroup should have similar characteristics to the whole sample.
2.Non-probability sampling techniques are often used in exploratory and qualitative research.
Yes
No
3.A .................... sample simply includes the individuals who happen to be most accessible to the researcher.
Convenience sampling
Purposive sampling
Snowball sampling
Cluster sampling
Stratified sampling
4.Probability Sampling Techniques
Simple random
Stratified random
Cluster sampling
Systematic sampling
Quota sampling
5.Non-probability Sampling Techniques
Quota sampling
Snowball sampling
Judgment sampling
Convenience sampling
Systematic sampling
6.The purpose of the Pilot Test is to evaluate the feasibility, time, cost, risk, and performance of a research project.
Yes
No
7.Census...........................................................
An enumeration of people, houses, firms, or other important items in a country or region at a particular time.
Asked for a Social Security number, bank account information, or information about political party affiliation.
8.Categorical data is data that is grouped into categories, such as data for a 'gender' or 'smoking status' variable. Categorical data can be further classified as:
nominal
interval
ratio
discrete
9.Examples of primary sources?
archives and manuscript material
photographs, audio recordings,
government publications
oral histories
video recordings, films.
10.Skewness is a measure of the symmetry of a distribution.
Yes
No
11.The daily computer sales for company Neelofa in 10 consecutive days are given as follows; 16,17,18,21,19,20,26,22,23,24.Find the mean........
21.6
20.6
20.2
21.6
12.The daily computer sales for company Neelofa in 10 consecutive days are given as follows; 16,17,18,21,19,20,26,22,23,24.Find the variance........
9.23
9.22
9.24
9.25
9.26
13.The daily computer sales for company Neelofa in 10 consecutive days are given as follows; 16,17,18,21,19,20,26,22,23,24.Find standard deviation........
3.01
3.02
3.03
3.04
3.05
14.The following data is the air-condition sales data of QA Sdn. Bhd.--- 18,11,14,8,11,11,8,8...Find the range.
10
11
12
13
14
15.The following data is the air-condition sales data of QA Sdn. Bhd.--- 18,11,14,8,11,11,8,8...Find the mean.
1.124
1.123
1.125
1.122
1.120
16.The following data is the air-condition sales data of QA Sdn. Bhd.--- 18,11,14,8,11,11,8,8...Find the variance.
10.608
10.609
10.607
10.601
10.60
17.The following data is the air-condition sales data of QA Sdn. Bhd.--- 18,11,14,8,11,11,8,8...Find the standard deviation.
3.257
3.477
3.567
3.176
3.127
18.A survey was conducted on 12 patients in a hospital. The number of days they stayed in the hospital was recorded as follows.
3,7,2,4,5,1,1,6,4,8,10,14
Calculate Mean
5.32
5.42
5.22
5.72
5.52
19.A survey was conducted on 12 patients in a hospital. The number of days they stayed in the hospital was recorded as follows.
3,7,2,4,5,1,1,6,4,8,10,14
Calculate Variance
14.25
14.99
14.77
14.23
14.55
20.A survey was conducted on 12 patients in a hospital. The number of days they stayed in the hospital was recorded as follows.
3,7,2,4,5,1,1,6,4,8,10,14
Calculate Standard deviation
3.87
3.67
3.56
3.81
3.47
21.What are grouped data?
Grouped data is data that has been organized in classes after its analysis
To calculate the mean of grouped data, the first step is to determine the midpoint of each interval or class.
In the case of grouped data, the range is the difference between the upper boundary of the highest class and the lower boundary of the lowest class.
Grouping does lose precision and any graphs, tables, or statistics generated from grouped data will not be as exact as if raw data would be used.
22.Find the MEAN ;
59, 65, 61, 62, 53, 55, 60, 70, 64, 56, 58, 58, 62, 62, 68, 65, 56, 59, 68, 61, 67
61.2357
60.38095
61.38095
61.0375
23. Focus Group.......
A focus group is a research technique used to collect data through group interaction.
A focus group is a small-group discussion guided by a trained leader.
Focus groups are used to identify and explore how people think and behave, and they throw light on why what and how questions
The main purpose of focus group research is to draw upon respondents' attitudes, feelings, beliefs, experiences and reactions in a way in which would not be feasible using other methods, for example, observation, one-to-one interviewing, or questionnaire surveys.
24.Continuous variables can take on any real number value.
height
temperature
number of siblings
year of birth
gender
25.Discrete variables can only be specific values. For example:
number of siblings
year of birth
gender
t-shirt size (small, medium, large)
temperature
26.Categorical variables have values that describe labels or attributes. Even if the categories can be placed in natural order, they have no magnitude or units. There are two major scales for categorical variables:
gender
favourite colour
nationality
height
number of siblings
27.Independent variable
What you can decide to change in an experiment.
What you observe or measure
Things you keep the same –do not change.
28.Categorical variable.....................
predictors include gender
material type
payment method
the number of customer complaints
the number of flaws
29.Discrete variable............
date and time a payment is received
the number of customer complaints
the number of flaws or defects.
30.An interval variable......................
is similar to an ordinal variable, except that the intervals between the values of the numerical variable are equally spaced.
the variable is similar to a categorical variable.
is one that has two or more categories, but there is no intrinsic ordering to the categories.
For example, suppose you have a variable such as annual income that is measured in Ringgit Malaysia, and we have three people who make RM 10,000, RM15,000 and RM 20,000. The second person makes RM 5,000 more than the first person and RM 5,000 less than the third person, and the size of these intervals is the same. If there were two other people who make RM 90,000 and RM 95,000, the size of that interval between these two people is also the same (RM5,000).
31.Nominal scale is often used in research surveys and questionnaires where only variable labels hold significance.
Yes
No
32.Nominal Scale Examples
Gender
Political preferences
Place of residence
33.Nominal
genotype
blood type
zip code
gender
race
34.Examples of ordinal variables include:
socio-economic status (“low income”,” middle income”,” high income”)
education level (“high school”,” BS”,” MS”,” PhD”)
income level (“less than 50K”, “50K-100K”, “over 100K”)
satisfaction rating (“extremely dislike”, “dislike”, “neutral”, “like”, “extremely like”)
35.Examples of ratio variables include:
enzyme activity,
dose amount
reaction rate
flow rate
weight
36.A bowler has the following scores for FIVA games. 166,156,180,170,166. Using these data as a sample, compute the MEAN;
167.6
166.7
164.7
165.7
166.7
37.A bowler has the following scores for FIVA games. 166,156,180,170,166. Using these data as a sample, compute the MEDIAN;
166
166.5
167
167.5
168
38.A bowler has the following scores for FIVA games. 166,156,180,170,166. Using these data as a sample, compute the MODE;
166
167
165
168
39.A continuous variable is a numeric variable. Observations can take any value between a certain set of real numbers
Yes
No
40.What are the 3 measures of central tendency?
Mean
Mode
Median
Standard deviation
Variances
