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Statistics Test...

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  • Question 1
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    Directions For Questions

    Study the following table and answer the questions based on it.
    Expenditure of a Company (in Lakh Rupees) per Annum Over the given years.
    YearSalaryFuel and TransportBonusInterest on LoansTaxes
    $$1998$$$$288$$$$98$$$$3.00$$$$23.4$$$$83$$
    $$1999$$$$342$$$$112$$$$2.52$$$$32.5$$$$108$$
    $$2000$$$$324$$$$101$$$$3.84$$$$41.6$$$$74$$
    $$2001$$$$336$$$$133$$$$3.68$$$$36.4$$$$88$$
    $$2002$$$$420$$$$142$$$$3.96$$$$49.4$$$$98$$

    ...view full instructions

    What is the average amount of interest per year which the company had to pay during this period?

  • Question 2
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    Mean of marks obtained by $$10$$ students is $$30$$.
    Marks obtained are $$25,30,21,55,47,10,15,x,45,35$$.
    Find the value of $$x$$.

  • Question 3
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    Find AM of divisors of $$100$$.

  • Question 4
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    If the Arithmetic mean of $$8, 6, 4, x, 3, 6, 0$$ is $$4$$; then the value of $$x =$$

  • Question 5
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    Directions For Questions

    $$0-9$$$$40$$
    $$10-19$$$$50$$
    $$20-29$$$$70$$
    $$30-39$$$$40$$

    This shows the distribution of students and the number of hours they work.

    ...view full instructions

    The relative frequency of students working $$9$$ hours or less is

  • Question 6
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    Mean of $$40$$ observations was given as $$160$$.It was detected that $$125$$ was misread as $$160$$. Find the correct mean.

  • Question 7
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    The histogram shows the birth weights of 100 new born babies.
    How many babies weighed 8 lb or more?

  • Question 8
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    Directions For Questions

    $$0-9$$$$40$$
    $$10-19$$$$50$$
    $$20-29$$$$70$$
    $$30-39$$$$40$$

    This shows the distribution of students and the number of hours they work.

    ...view full instructions

    Find the number of students working $$19$$ hours or less.

  • Question 9
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    The mean age of $$25$$ students in a class is $$12$$. If the teacher's age is included, the mean age increases by $$1$$. Then teacher's age (in years) is:

  • Question 10
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    The mean salary paid per week to $$1000$$ employees of an establishment was found to be Rs. $$900$$. Later on, it was discovered that the salaries of two employees were wrongly recorded as Rs. $$750$$ and Rs. $$365$$ instead of Rs. $$570$$ and Rs. $$635$$. Find the corrected mean salary.

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