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WorksheetsInter School Quiz (English Medium) Paper 03
Total questions: 25
Worksheet time: 15mins
Which of the following statements is true?
The infinite population is also known as the countable population.
Sampling errors cannot be reduced by increasing the sample size.
The set of all elements/members included in the field of the statistical study is termed as ‘Population’.
In the case of the census, there is a difference between the target population and sampled population.
Which of the following statements is false?
Lorenz curve is used for comparing a specific situation with the common situation.
The value of Gine coefficient is between 0 - 1.
Stem and leaf diagram as an optional method to the array of data.
A “more than” ogive falls downwards from left to the right.
The sum of the frequencies below the …………………… of a class interval of a distribution is known as the ‘less than’ cumulative frequency of that class interval.
upper-class limit
upper-class boundary
lower-class boundary
upper-class limit
‘Less than’ ogive and ‘or more’ ogive both intersect at …………. of the distribution, and that value can be identified by drawing a perpendicular line from that intersected point to the horizontal axis.
mode
first quartile
mean
Second quartile
The mean wages of 10 employees of a particular company has been calculated as 6500. The administrator of the company was decided that amended Rs.200 as a fine since employees have damaged to a new machine. Then the new mean wages of 10 employees should be,
6700
6520
6300
6500
In the case of symmetrical distribution, the most appropriate measures of dispersion is …………………
mean
standard deviation
mean deviation
quartile deviation
What is the most appropriate measure used to compute the Mean of data in the different Relative Importance in averaging rates of increase or decrease?
Arithmetic mean
Harmonic mean
Weighted mean
Geometric mean
The moderately skewed distribution, the median and mean are 15 and 18 respectively. What is the most possible value for the mode of that distribution?
9
15
12
17
Which of the following statements is false?
If the regression coefficient of Y on X is greater than one, the regression coefficient of X on Y must be less than one.
If the regression coefficient of Y on X positive, the correlation coefficient is also positive.
Product Moment Correlative Coefficient lay the range of 0 to 1.
Units of the regression coefficient are the same as the units of the dependent variable.
In simple linear regression analysis, the coefficient of determination was found to be 0.81. What is the value of product movement correlation coefficient of that data set?
0.9
0.09
0.81
0.66
In ………………………., it is able to use the experience of the people involved in the business field during a long period.
mathematical approach
subjective approach
classical approach
relative frequency approach
How many ways to select three children from a group consists of four boys and three girls?
210
105
70
35
If A and B are independent events with
P(A′)=43, P(A∩B)=121, P(B)=X then the value of X is,1/3
1/9
2/3
1/2
If X has a binomial distribution with n = 20, P = 0.6 parameters. Find the standard deviation of that distribution.
4.8
48
48
4.8
Which of the following statements is false?
Cluster sampling can be used without a complete sampling frame.
Non-response errors may be reduced by increasing the sample size.
Stratified random sampling is more effective if variation within a stratum is low.
The standard error cannot be calculated in quota sampling.
Which country does not belong to “Group of Seven (G7)”?
UK
German
China
Japan
Which movie awarded as the Best Original Screenplay in 92nd Academic Awards/ Oscar Awards?
Once Upon a Time in Hollywood
Parasite
Joker
1917
What is the capital of the country denoted by this flag?
Brussels
Kabul
Kairo
Asmara
When is World Population Day?
15th June
16th August
11th July
17th September
What is the largest natural lake in Sri Lanka?
Bolgoda Lake
Gregory Lake
Kandy Lake
Kala Wewa
What are the two numbers should replace the question marks?
10, 30, 32, 96, 98, 294, 296, ?, ?
350, 375
888, 890
575, 580
425, 590
The average of three numbers is 48. The average of two of these numbers is 56. What is the third number?
42
28
32
16
What number should replace the question mark?
15
21
09
14
Which of the following is not an anagram of a type of building?
spoil hat
pet hens
eel clog
admit us
A greengrocer found that 68 tomatoes were mouldy in a box he received, which was 16 per cent of the total contents of the box. How many tomatoes were in the box?
425
575
450
525
