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BB Select the statements where descriptive statistics is used.
I. Increase in the annual sales of hamburgers in the district was 30% of the sales of previous year.
II. Infant morality rate in an underdeveloped country registered a drop of 10% during the last decade.
III. Defence accounted 30% of the annual budget for the year 2003 - 2004.
IV. There are 1200 regular users of internet in a school of 2000 students. BB |
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BB Select the statements where inferential statistics is used.
I. The average annual salary of a software engineer in the age group of 23 - 25 is $50,000.
II. Increase in the price of steel from 1990 to 1995 was 37%.
III. The number of students getting enrolled in a university increases 10% every year.
IV. Number of mobile telephone connections in the country increased 20 times during the past 5 years. BB |
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BB Select the qualitative variables.
I. School districts participating in the competition
II. Countries from which films are nominated for oscar awards
III. Religions represented in the ceremony
IV. Aggregate score of each student
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BB Identify the interval level of data.
I. height
II. nationality
III. age
IV. IQ
V. time
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BB Select the quantitative variables.
I. Monthly sales of each type of TV
II. Goals scored by each team in world cup soccer
III. Color of jerseys of each team in world cup soccer
IV. Medals won by each country in olympics
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| BB In the annual sales conference, first the sales executives were classified according to the districts they represent. In other case, they were classified as superior, average and inferior on their ability to present a case. To which measurement level do these classifications belong to? BB |
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BB Classify the data according to the level of measurement. [nominal - N, ordinal - O, interval - I, ratio - R]
1. temperature
2. wages
3. time
4. zip code
5. grade
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| BB Which statement is incorrect for the interval level of measurement? BB |
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BB Pizza huts in a town are classified according to the following.
1. locality of the shop
2. sales turnover
3. taste of the pizza
4. price of the pizza
Identify the level of measurement of classification as nominal (N), ordinal (O), interval (I) and ratio (R).
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BB Give boundaries for each value.
I. 1 feet
II. 22.5 miles
III. 0.15 inches
IV. 10 kgs
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BB Give boundaries for each value.
I. 10 calories
II. 20 joules
III. 100 gallons
IV. 1000 litres BB |
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BB Give boundaries for each value.
I. 4 newtons
II. 43 watts
III. 44 pascals
IV. 40 fahrenheit
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BB Find the boundaries of each.
I. 2.3 quarts
II. 0.35 centimeter
III 3.6 feet BB |
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BB Which of the following statement(s) is/are true?
I. The number of days of leave per year that an employee can avail is an example of nominal data.
II. The boundaries of 86°F are 85.5°F - 86.5°F.
III. Data classified according to color are measured on nominal scale.
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BB Which of the following statement(s) is/are true?
I. The highest level of measurement is the interval level.
II. The height of president Bush is an example of a variable.
III. The variable of age is an example of a qualitative variable. BB |
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BB Select each variable as discrete (D) or continuous (C).
I. The number of burglaries reported each month in a city.
II. The number of business units a person has.
III. The number of workers in a factory.
IV. The amount of calcium contained in a glass of milk. BB |
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| BB In a college, students were classified according to the major field they have chosen. This classification is called a ________ level of measurement. BB |
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BB Select the statements related to descriptive statistics.
I. collection of data
II. organization and summarization of data
III. presentation of data
IV. determine relationships among variables of the data
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BB Which of the following are true for inferential statistics?
I. generalises from samples to population
II. uses probability
III. performs estimations and hypothesis to statistics
IV. makes predictions BB |
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| BB The age of every fourth person coming to attend a show was recorded. Which of the following is true? BB |
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BB Select the correct statement(s).
I. Variables whose values are determined by chance are called random variables.
II. Value assumed by a variable is called data.
III. A variable is a characteristic or attribute that can assume different values. BB |
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BB The height of 5 students are recorded as 4'3", 4'8", 5'1", 5'3" and 4'6". Which of the statements are correct?
I. 4'8" is a data value.
II. Variable in this case is height.
III. Data set is 5. BB |
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BB Select the areas where probability is used.
I. insurance industry
II. end of the course examinations
III. weather predictions
IV. baseball game BB |
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BB Statistics find use in determining relationships among variables. Which of the following represent such cases?
I. use of coconut oil and heart attack
II. lung cancer and smokers
III. number of accidents on a highway
IV. monthly salary and annual salary
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BB Select the statements according to descriptive statistics (D) or inferential statistics (I).
1. 40 out of 100 heart patients admitted in a hospital were smokers.
2. Usage of a particular drug would reduce the number of heart attacks in the age group of 45 - 50 years.
3. The chances of getting a defective TV from a batch of 500 TV's dispatched from a manufacturing unit is 0.02.
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BB Select the wrong statement(s).
I. Two major branches of statistics are statistics and probability.
II. A group of all subjects under study is called a population.
III. Statistics is the science of conducting studies to collect, organize, summarize, analyze and draw conclusions from data. BB |
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BB Classify the variables as quantitative (QT) and qualitative (QL).
I. Height of children in a class
II. Number of vehicles sold from a shop in a month
III. Color of shirts displayed in a sales counter.
IV. Monthly expenditure of families.
V. Religious preference among the inmates of a housing colony BB |
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BB The physical education instructor classified the boys in the class according to their physical build as small, medium and heavy. This classification is called ________ level of measurement.
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BB Select each of the following as nominal (N), ordinal (O), interval (I), ratio level (R).
I. Classification of residents according to zip codes.
II. The number of phone calls received on a particular day in an organization.
III. Grades of students in a school final exam.
IV. IQ levels of various students in a school. BB |
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