INTERGER (ADDTION) SESSION 1

What is the sum of -7 and +5?

• a) -2

• b) 12

• c) -12

• d) 2

What does the term decile mean in grouped data?

• a.) It is the average of the highest and lowest values.

• b.) It divides the dataset into ten equal parts.

• c) It represents the middle value of the dataset.

• d) It is always equal to the mean.

What is the lower boundary (LB) of a quartile class in a frequency distribution?

• A. The upper limit of the quartile class

• B. The midpoint of the class interval

• C. The lower class boundary of the quartile class

• D. The cumulative frequency before the quartile class

Which formula is used to find the percentile in grouped data?

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What does the term quartile mean in ungrouped data?

• a) It divides the data into four equal parts.

• b) It divides the data into ten equal parts.

• c) It is the sum of all frequencies.

• d) It represents the total number of observations.

In a grouped dataset, the formula for computing percentiles is given as P_k = LB + [(kN/100 - cf) / f] × i. What does cf represent in this formula?

Which of the following best describes the process of determining the 4th decile (D₄) in grouped data?

• a) The D₄ class is identified by finding the class interval that contains the (4/10)Nth value in the cumulative frequency distribution.

• b) The D₄ value is always equal to the third quartile (Q₃) of the dataset.

• c) The D₄ class is determined by finding the class interval with the highest frequency and applying the decile formula.

• d) The 4th decile (D₄) is always equal to the dataset’s mean value.

What does the term quartile mean in ungrouped data?

• a) It divides the data into ten equal parts.

• b) It is the sum of all frequencies.

• c) It represents the total number of observations.

• d) It divides the data into four equal parts.

Which of the following is the best interpretation of Quartile in real-life situations?

• a) Determining the class that has the highest score.

• b) Dividing the class into two equal groups.

• c) Determining the performance level of students.

• d) Identifying the frequency of data.

A researcher is analyzing the final exam scores of 250 students and wants to determine the 7th decile (D₇). The class interval that contains the (7/10)Nth score has: A lower boundary (LB) of 55.5 , A cumulative frequency (cf) before this class of 160 , A frequency (f) of 50 and A class width (i) of 5. Using the decile formula of group data. What is the computed value of D₇?

• a) 61.75

• b) 59.25

• c) 60.50

• d) 62.00