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Statistics Test...

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  • Question 1
    1 / -0

    The variance of the following data is :

    Length of rod$$72.0-73.9$$$$74.0-75.9$$$$76.0-77.9$$$$78.0-79.9$$$$80.0-81.9$$
    No. of Rods$$7$$$$31$$$$42$$$$54$$$$33$$

  • Question 2
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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 3
    1 / -0

    Find variance for following data:

    Class interval$$30-40$$$$40-50$$$$50-60$$$$60-70$$$$70-80$$$$80-90$$$$90-100$$
    Frequency$$3$$$$7$$$$12$$$$15$$$$8$$$$3$$$$2$$

  • Question 4
    1 / -0

    Find variance for the following data:

    Wages125-175175-225225-275275-325325-375375-425425-475475-525525-575
    Workers222191434611

  • Question 5
    1 / -0

    $${\sigma}^2$$ is  known as 

  • Question 6
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    Find the variance of first $$10$$ multiples of $$3$$.

  • Question 7
    1 / -0

    Standard Deviation of first n natural numbers.

  • Question 8
    1 / -0

    Directions For Questions

    Factory$$A$$$$B$$
    Number of Workers$$4000$$$$5000$$
    Mean Wages$$3500$$$$3500$$
    Variance in wages$$64$$$$81$$

    ...view full instructions

    Which factory has more variation in wages?

  • Question 9
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    Variance of first $$n$$ natural numbers.

  • Question 10
    1 / -0

    Find the Standard Deviation of of first $$10$$ multiples of $$3$$.

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