Self Studies

Statistics Test - 34

Result Self Studies

Statistics Test - 34
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    $$0 - 10, 10 - 20, 20 - 30 ,...$$ are the classes, then the lower boundary of the class $$20 - 30$$ is _____
  • Question 2
    1 / -0
    $$1 - 5, 6 - 10, 11 - 15 ,...$$ are the classes of a distribution, the upper boundary of the class $$1 - 5$$ is _____
    Solution
    As the classes are inclusive form, upper boundary of the class $$ 1 - 5 = 5 + 0.5 = 5.5 $$
  • Question 3
    1 / -0
    Refer the figure given above and answer the following questions.
    How many class-intervals have equal frequency?

    Solution
    We can see that two class intervals have bars drawn to the same height of $$ 10 .$$ Hence, two is the correct answer.
  • Question 4
    1 / -0
    The class marks of intervals $$20-30$$ and $$10-20$$ are:
    Solution
    Class mark is the average of upper limit and lower limit of the given class interval.

    Therefore, class mark of $$20-30$$ interval is $$\dfrac{20+30}{2}=\dfrac{50}2=25$$

    Class mark of $$10-20$$ interval is $$\dfrac{10+20}{2}=\dfrac{30}2=15$$
  • Question 5
    1 / -0
    In a frequency distance with classes $$0-10, 10-20$$ and so on, the size of class interval is $$10$$. lower limit of fourth class is
    Solution
    Classes - $$0-10, 10-20, 20-30, 30-40$$
    Hence, lower limit of fourth class is $$30$$
  • Question 6
    1 / -0
    Total number of students in all are:

    Solution
    From the histogram:
    Height (in cm)No. of students 
    $$150-155 $$ $$5 $$
    $$155-160$$ $$1$$
    $$160-165$$ $$ 5$$
    $$ 165-170$$ $$5$$
    $$ 170-175$$ $$ 9$$
    $$ 175-180$$ $$5$$
    Total no. of students $$=n(150)+n(155)+n(160)+n(165)+n(170)+n(175)$$
    $$=5+1+5+5+9+5$$ $$=30$$.

    Therefore, there are $$30$$ students in total.
    Hence, option $$D$$ is correct.
  • Question 7
    1 / -0

    Directions For Questions

    Class (science marks)$$10-20$$$$20-30$$$$30-40$$$$40-50$$$$50-60$$$$60-70$$$$70-80$$

    total
    Frequency (No. of students)$$2$$$$4$$$$12$$$$15$$$$18$$$$25$$$$14$$

    $$90$$

    With reference to the given data answer the following question:

    ...view full instructions

    Frequency of $$48$$ is
    Solution
    Observe the table ,since 48 lies in between 40-50 ,we would take this class interval and its frequency is 15.
  • Question 8
    1 / -0

    Directions For Questions

    Class (science marks)$$10-20$$$$20-30$$$$30-40$$$$40-50$$$$50-60$$$$60-70$$$$70-80$$

    total
    Frequency (No. of students)$$2$$$$4$$$$12$$$$15$$$$18$$$$25$$$$14$$

    $$90$$

    With reference to the given data answer the following question:

    ...view full instructions

    If the passing marks are $$41$$, the no of students that failed is
    Solution
    No. of failed student $$= 2 + 4 +12  = 18$$
  • Question 9
    1 / -0

    Directions For Questions

    The frequency table of the weights (in kilograms) of the student is given alongside.
    Answer the question with reference to the given data.
    Class intervals (wt. in kg)Frequency (No. of student)
    $$40 - 45$$$$8$$
    $$45 - 50$$$$15$$
    $$50 - 55$$$$14$$
    $$55 - 60$$$$9$$
    $$60 - 65$$$$3$$

    ...view full instructions

    No. of students weighing less than $$56$$kg are
    Solution
    No. of students weighing less than 56kg  = 8 + 15 + 14 = 37 student
  • Question 10
    1 / -0
    What is the minimum height possible of the tallest student?

    Solution
    From the histogram:
    Height (in cm)No. of students 
    $$150-155 $$ $$5 $$
    $$155-160$$ $$1$$
    $$160-165$$ $$ 5$$
    $$ 165-170$$ $$5$$
    $$ 170-175$$ $$ 9$$
    $$ 175-180$$ $$5$$
    The minimum height of the tallest student belongs to class interval $$175-180.$$
    Thus, the minimum height possible is $$175$$ [$$\because$$ In class $$175-180, 175$$ is lower limit and can be included in class $$175-180$$]. 

    Hence, option $$B$$ is correct.
Self Studies
User
Question Analysis
  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now