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,STA1610 - Introduction to Statistics
Questions and Answers
Study Unit 1
1. Complete the following sentence: is a statistical methods that draws conclusions about the .
based on computed from the .
A. sample, inferential statistics, parameter, population
B. population, sample, descriptive statistics, parameter
C. inferential statistics, population, statistics, sample
D. descriptive statistics, population, statistics, sample
2. Which of the following is NOT a goal of descriptive statistics?
A. Summarising data
B. Displaying aspects of the collected data
C. Reporting numerical findings
D. Estimating characteristics of the population
E. Presentation of the data in the form of tables, charts and summary statistics
3. Which one of the following statements is incorrect with regard to a statistic?
A. A sample standard deviation is a statistic.
B. A statistic is an estimate of a population parameter.
C. A statistic is a summary measure calculated from a sample.
D. A population mean is a statistic. {A population mean is a parameter}
E. A statistic represents a property of a sample.
4. Which one of the following statements is incorrect?
1. A variable is a characteristic of an item or individual being measured
2. A sample is a portion of a population selected for analysis
3. In a pie chart, the size of segments varies according to the percentage in each category
4. An histogram describes better qualitative data than a bar chart {Histogram is used for Quantitative data}
5. The mode is the most frequent observation in a data set
5. What is a summary measure that is calculated from a sample to describe a characteristic of a population?
(1) Boxplot.
(2) Data.
(3) Parameter.
(4) Population.
(5) Statistic.
6. Which one of the following statements is incorrect with regard to qualitative or categorical data?
(1) Categorical data is measured on an ordinal or nominal scale.
(2) The frequency or count of each element can be determined.
(3) The mode can be determined.
(4) The mean can be calculated.
(5) None of the above.
7. Which one of the following statements is incorrect?
(1) A population is a complete set of objects in the study while a sample is a subset of a population.
(2) A statistic is a property of a population while a parameter is a property of a sample.
(3) Data from a sample are in a form of variables, which can either be numeric or categorical.
(4) Quantitative data are numeric and can either be discrete or continuous.
(5) Qualitative data are categorical and uses labels to identify attributes.
This study source was downloaded by 100000894283260 from CourseHero.com on 01-20-2025 14:34:54 GMT -06:00
, 8. Which one of the following variables is not categorical?
A. Gender of a person
B. Name of internet provider
C. Height of a person
D. Marital Status of a person
E. Classifying an object as defective or non-defective
9. Which one of the following statements is correct?
1. Gender, marital status and religion are examples of qualitative ordinal variables
2. The amount of money a person spends in a shopping mall is a discrete variable
3. The number of girls with blue eyes is a discrete variable
4. The position one finishes in a race is a discrete variable.
5. The number of times a mouse makes a wrong turn in a laboratory represents a continuous variable
10. Which one of the following statements is incorrect with regard to variables and their scale of measurements?
A. Quantitative discrete variables result from counting attributes of an element.
B. Quantitative continuous variables result from measuring attributes of an element.
C. The mean and the median cannot be determined for a nominal scale of measurement.
D. Ordinal scale of measurement is a higher level of measurement that interval scale
This study source was downloaded by 100000894283260 from CourseHero.com on 01-20-2025 14:34:54 GMT -06:00
1. Which one of the following statements is incorrect with regard to variables and their scale of
measurements?
A. Quantitative discrete variables result from counting attributes of an element.
B. Quantitative continuous variables result from measuring attributes of an element.
C. The mean and the median cannot be determined for a nominal scale of measurement.
D. Ordinal scale of measurement is a higher level of measurement that interval scale
2. The two graphical techniques that can be used to represent nominal data are
1. Bar chart and histogram
2. Pie chart and ogive
3. Bar chart and pie chart
4. Histogram and ogive
5. Pie chart and histogram
3. Consider the following scores: 5 3 2 13 2
The outlier score is:
1.5
2.2
3. 2 and 5
4. 2 and 13
5. 13
4. Given the following symbols
Α. μ – Population mean
B. S – Sample Standard deviation
C. X̅ - Sample mean
D. σ – Population Standard deviation
Identify the symbols that represents a parameter as a measure of a population
1. Only A
2. A and D
3. B and C
4. C and D
5. A and C
5. The following data give the starting admission price (in R) for one-day tickets to 10 theme parks
58 63 41 42 29 50 62 43 40 40
Which of the following statements is correct?
1 The mean X = 46 and the standard deviation S = 11.01
2 The mean X = 42.8 and the standard deviation S = 10.10
3 The mean X = 46 8 and the standard deviation S = 11 10
4 The mean X = 46 and the standard deviation S = 10 53
5 The mean X = 46.8 and the standard deviation S = 123 29
6. The ages of a sample of 40 workers are shown below using a stem-and-leaf diagram
2 5 6 6 8 8 9
3 0 1 2 3 3 3 4 5 5 6 6 7 7 8 9 9
4 0 0 1 1 1 1 6 6 6 8 9
5 0 0 1 2 3
6 1
This study source was downloaded by 100000894283260 from CourseHero.com on 01-20-2025 14:35:07 GMT -06:00
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