Quiz about PHRONESIS MIND 2024 - Inter - School Individual (English Medium)

Question 1

Who was the United States Assistant Secretary of State who arrived in Sri Lanka on December 5, 2023?

Accepted Answer

Donald Lu

Answer

Linda Thomas-Greenfield

Answer

Robert A. Wood

Answer

David M Robinson

Question 2

Which Sri Lankan cricketer was handed a one-year ban under the ICC Anti-Corruption Code in October 2024?

Accepted Answer

Praveen Jayawickrama

Answer

Nishan Madushka

Answer

Binura Fernando

Answer

Chamika Gunasekara

Question 3

What is the short telephone number used in Sri Lanka to contact for inquiries related to examination matters?

Accepted Answer

1911

Answer

1912

Answer

1913

Answer

1914

Question 4

Who was the author awarded the Nobel Prize in Literature in the year 2023?

Accepted Answer

Jon Fosse

Answer

Salman Rushdie

Answer

Annie Ernaux

Answer

Haruki Murakami

Question 5

Which country surpassed Germany as the world's second-largest exporter of motor vehicles in the year 2023?

Accepted Answer

China

Answer

South Korea

Answer

United Kingdom

Answer

Japan

Question 6

Select the option that correctly represents the next two numbers in the following numerical sequence.

7, 29, 65, 115, .........., ..........

Accepted Answer

179, 257

Answer

148, 258

Answer

148, 253

Answer

179,253

Question 7

Siril travels from home to his office by bicycle at a uniform speed of 10 kmh^-1, and it takes him 50 minutes to reach the office. If he travels by motorcycle at a uniform speed of 100 kmh^-1, how much time will it take for him to reach the office?

Accepted Answer

05 Minutes

Answer

25 Minutes

Answer

30 Minutes

Answer

15 Minutes

Question 8

A hall has 5 entrance gates and 4 exit gates. It is not allowed to enter through an exit gate or exit through an entrance gate. How many ways can a person enter and then exit the hall?

Accepted Answer

20

Answer

15

Answer

25

Answer

05

Question 9

A factory has two machines: one is new, and the other is old. The new machine can complete a certain task in 30 hours, while the old machine takes 60 hours to complete the same task. To expedite the task, the factory manager starts both machines simultaneously. What percentage of the task will be completed in 10 hours?

Accepted Answer

50%

Answer

40%

Answer

55%

Answer

60%

Question 10

Consider this stem and leaf diagram. All possible extreme values of the distribution are,

Accepted Answer

218, 278, 288

Answer

218, 219, 288

Answer

218, 219, 220

Answer

262, 278, 288

Question 11

In a messokurtic distribution, if the interdecile range is 120 and the value of the third quartile (Q3) is exactly three times the value of the first quartile (Q1), what is the value of Q3?

Accepted Answer

94.68

Answer

15.78

Answer

31.56

Answer

63.12

Question 12

In a certain region, individuals are categorized into three income levels, and the relevant information is presented in the table. If the average monthly income of all individuals in the region is Rs. 90,000, what are the respective percentages of individuals in the high-income and middle-income categories?

Accepted Answer

80% and 20%

Answer

15% and 60%

Answer

20% and 80%

Answer

40% and 60%

Question 13

In a data distribution consisting of 40 observations, the median is 45, and the mean is 48. However, it was later discovered that one recorded observation of 50 was incorrect, and its actual value should be 60. After making this correction, what will be the revised values of the mean and median, respectively?

Accepted Answer

45.25 and 48

Answer

45.25 and 60

Answer

55 and 48

Answer

55 and 60

Question 14

The correlation coefficient between advertising expenditure (X) (in thousands of rupees) and sales revenue (Y) (in thousands of rupees) is given as r=0.7.

The provided statistics are as follows:

Mean of X (Advertising Expenditure) = 54

Standard Deviation of X = 3.6

Mean of Y (Sales Revenue) = 102

Standard Deviation of Y = 12.6

Given these values, what is the expected sales revenue when the advertising expenditure is 80?

Accepted Answer

165,700

Answer

156,000

Answer

226,300

Answer

248,200

Question 15

If A and B are two independent events, the given probabilities are:

Probability that both events occur = 1/10, Probability that neither event occurs = 2/5, and P(A) < P(B).

Using these conditions, what is the value of P(B)?

Accepted Answer

P(B) = 1/2

Answer

P(B) = 1/5

Answer

P(B) = 1/10

Answer

P(B) = 2/3

Question 16

What is the probability of having 53 Mondays in a normal year?

Accepted Answer

1/7

Answer

53/365

Answer

1/53

Answer

0

Question 17

Which of the following statements regarding the limitations of statistics is true?

Accepted Answer

Statistical conclusions being involved in uncertainly.

Answer

Falsely interpretation of the results of an analysis.

Answer

Statistical methods can be used to verify any situation unconditionally.

Answer

In statistics, only business phenomena can be measured.

Question 18

Consider the following statements regarding measurement scales:

A - In Nominal Scale data, the mode is meaningful.

B - In Interval Scale data, addition and subtraction are not meaningful operations.

C - Calculating the standard deviation is meaningful for Ratio Scale data.

Which of the above statements are true?

Accepted Answer

Only A and C

Answer

Only A and B

Answer

Only B and C

Answer

All A, B, and C

Question 19

The measurement that provides a quick and general idea about dispersion over a short period is:

Accepted Answer

Range

Answer

Quartile Deviation

Answer

Median Deviation

Answer

Median

Question 20

Which of the following statements regarding correlation is true?

Accepted Answer

When the two variables are measured on an ordinal scale, Spearman's rank correlation coefficient is more appropriate for measuring their correlation.

Answer

The correlation between a quantitative variable and a categorical variable cannot be quantified.

Answer

The chi-square test is used to measure the correlation between two categorical variables.

Answer

The linear as well as non-linear correlation between two quantitative variables is measured using Karl Pearson's product-moment correlation coefficient.

Question 21

Consider the following statements:

A - Frequency density is used in constructing a histogram for a frequency distribution with unequal class intervals.

B - A frequency polygon cannot be constructed without a histogram.

C - It is not necessary for the area of the histogram to be equal to the area enclosed by the frequency polygon.

Among the above statements, the true statements are:

Accepted Answer

Only A

Answer

Only B

Answer

Only A and C

Answer

All A, B and C

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