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WorksheetsInter School Quiz (English Medium) Paper 05
Total questions: 25
Worksheet time: 15mins
Which of the following statements is false?
Inferential statistics used to make inferences from the sample and generalized them to the population.
Data collected from any outside person or outside institution for a particular study such data are called secondary data.
Once a particular data point can be put into a group such an observation is known as categorical data.
Individual observations cannot be identified in a grouped frequency distribution.
Which of the following statements is true?
Z chart is used for comparing a specific situation with the common situation.
There is an absolute zero in interval scaled data.
A ‘or more’ ogive falls upwards from left to the right.
No any mathematical operation can be launched on nominal data.
Since it is assumed that all the observations inserted in a class interval overlap on the class mark (class midpoint) the ……………. is occurred.
Sampling error
Non-sampling error
Grouping error
Editing error
Representation of the movement of a variable in a linear formation in accordance with a given scale on co-ordinate plan is known as a ……………...
Graph
Chart
Multi-dimensional chart
Z chart
In a frequency distribution, if the mode is less than the mean and the median is greater than the mode, but less than the mean, then the shape of the distribution is,
negatively skewed
positively skewed
symmetrical
leptokurtic
In the case of symmetrical distribution, the most appropriate measures of central tendency and dispersion is ………………… respectively.
mean and standard deviation
median and standard deviation
median and quartile deviation
mean and quartile deviation
In the case of a frequency distribution with open-ended classes, the measure of central tendency which can be easily used is,
mean
quartile deviation
median
range
The median of the series 2, 2, 9, 4, 7, 9, 5, 6, 6 is equals to ……………
7.5
6
7
8
Which of the following statements is false?
Product Moment Correlative Coefficient is a measure of dimension.
Product Moment Correlative Coefficient is independent from unit of measures.
Units of the regression coefficient are same as the units of the dependent variable.
If there is a non-linear relationship between two variables, Product Moment Correlative Coefficient equals to one.
If the regression coefficient of a specific regression line is -2.4, mean values of independent and dependent variables are 5, 18 respectively. Find the constant term of that regression line?
6
30
0.6
0.3
The basic assumption of ……………., is that all possible outcomes of random experiments are equally-likely.
mathematical approach
subjective approach
classical approach
relative frequency approach
How many ways to select three students as monitor, group leader and subject leader respectively among 7 students?
35
70
105
210
If A and B are any events with
P(A′∩B′)=61 , then the value of P(A∪B) is1/3
2/6
1/6
5/6
If X has a Poisson distribution with the mean value as 36, find the standard deviation of that distribution.
6
36
72
18
Which of the following statements is false?
The standard error cannot be calculated in non-probability sampling methods.
Convenience sampling can be considered as a non-probability sampling.
In systematic sampling, the term is called a sampling interval.
Non-sampling error can occur in the complete enumeration.
Which road indicated by A7?
Panadura-Ratnapura
Kandy-Jaffna
Colombo-Kandy
Avissawella-Nuwara Eliya
Where was the first covid19 case reported outside of China?
South Korea
Italy
Thailand
Malaysia
Who was awarded as the Best Upcoming Teledrama Actor in Raigam Tele’es 2020?
Randika Gunathilake
Kalana Gunasekara
Gihan Fernando
Roshan Ravindra
When is World Wildlife Day?
May 5
March 3
June 16
July 6
This picture shows a well-known American basketball player who died in a plane crash in 2020. Who is he?
James Harden
Lebron James
Kobe Bryant
Michael Jordan
Shani picked a basket full of apples from her orchard. She gave 75 per cent to her son, 0.625 of the remainder to her neighbour and then eaten one of the remainders. Finally, she left with just two apples. How many apples did she originally pick from her orchard?
32
28
45
52
The day after, the day after tomorrow is four days before Monday. What day is it today?
Monday
Tuesday
Wednesday
Thursday
What number should replace the question mark?
85
56
63
48
If 6121135 refers by "flame", then what is refers by 21215120 ?
"voice"
"bald"
"bloat"
"castle"
What is the next number in this series?
–3, +6, +2, –3, +7, –12, ?
12
-5
8
-8
