13.Statistics Quiz

What is the mean of ungrouped data?

• (∑xi)/n

• (∑fi xi)/(∑fi)

• a+(∑fi di)/(∑fi)

• (∑fi yi)/(∑fi)

Which method is also known as the Direct Method for finding the mean of grouped data?

• Assumed Mean

• Direct Method

• Step-deviation method

• Mean of grouped data when the frequency distribution is given in the form of class

What is the formula for finding the median?

• (n/2)th observation, if n is odd, else (n-1)/2th observation

• (n/2)th observation, if n is odd, else (n+1)/2th observation

• (n+1)/2th observation, if n is odd, else (n/2)th observation

• (n-1)/2th observation, if n is odd, else (n/2)th observation

What is the mode of statistical data?

• The variate that occurs least frequently

• The variate with the minimum frequency

• The variate with the maximum frequency

• The variate that occurs most frequently

What is the formula for finding the mean of grouped data using the Step-deviation method?

• ∑fi xi)/(∑fi)

• ∑fi yi)/(∑fi

• (∑fi xi)/(∑fi)

• a+(∑fi di)/(∑fi)

What is the central value of statistical data if it is arranged in ascending or descending order?

• Mode

• Mean

• Arithmetic mean

• Median

What is the formula for finding the mean of grouped data using the Direct Method?

• a+(∑fi di)/(∑fi)

• (∑fi xi)/(∑fi)

• ∑fi yi)/(∑fi

• ∑fi xi)/(∑fi)

Which method is also known as the provisional mean for finding the mean of grouped data?

• Assumed Mean

• Mean of grouped data when the frequency distribution is given in the form of class

• Direct Method

• Step-deviation method

What is the formula for finding the mean of grouped data when the frequency distribution is given in the form of class?

• a+(∑fi di)/(∑fi)

• (∑fi xi)/(∑fi)

• ∑fi yi)/(∑fi

• ∑fi xi)/(∑fi)

What is the mode of statistical data?

• The variate with the maximum frequency

• The variate with the minimum frequency

• The variate that occurs most frequently

• The variate that occurs least frequently