Teachoo MCQ Test

Assertion Reasoning Quiz

Preparing for CBSE

Chapter 5 Class 8 - Tales by Dots and Lines (Ganita Prakash II) | 7 questions

Timed test. Answer every question before time runs out. Correct answers and solutions appear after submission.
Time remaining 672
Question 1 of 7
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Question 1 of 7
Assertion (A): If 10 is added to every value, the mean also increases by 10.
Reason (R): For n values, the total increases by 10n, which increases the total divided by n by 10.
Two translated dot plotsThe second dot plot has the same pattern shifted ten units to the right.OriginalEach value + 10shift right by 10
Select one option. Answers are shown after the test.
Question 2 of 7
Assertion (A): The mean of every pair of odd numbers is odd.
Reason (R): The mean of 3 and 5 is 4.
Select one option. Answers are shown after the test.
Question 3 of 7
Assertion (A): Two data sets can have the same mean but very different spreads.
Reason (R): Two data sets with the same mean may also have different medians.
Select one option. Answers are shown after the test.
Question 4 of 7
Assertion (A): The same data can look more or less dramatic when the vertical scale changes.
Reason (R): A narrower displayed vertical range uses more plot height for the same numerical change.
Select one option. Answers are shown after the test.
Question 5 of 7
Assertion (A): For the data 2, 4 and 9, the mean is 5.
Reason (R): At 5, the total distance to values on the left is 3 + 1 = 4 and the distance to the value on the right is 4.
Dot plot with mean 5Dots are located at 2, 4 and 9. A vertical line marks the mean at 5.012345678910mean = 5
Select one option. Answers are shown after the test.
Question 6 of 7
Assertion (A): The formula =AVERAGE(D2:D23) finds the mean of the values in cells D2 through D23.
Reason (R): AVERAGE adds the values in the range and divides by the number of numerical entries.
Select one option. Answers are shown after the test.
Question 7 of 7
Assertion (A): The mean need not be the midpoint of the smallest and largest values.
Reason (R): The median is found from the middle position of ordered data.
Select one option. Answers are shown after the test.