### Scholastic Aptitude Test - Mathematics - Statistics

#### Question - 1

The formula for finding mode in a grouped frequency distribution is $1+\left( \frac { { f }_{ 1 }-{ f }_{ 0 } }{ 2{ f }_{ 1 }-{ f }_{ 0 }-{ f }_{ 2 } } \right) \times h$ What does f1 represent here?

• A frequency of the modal class
• B frequency of the class preceding the modal class
• C frequency of the class succeeding the modal class
• D frequency of the last class

#### Question - 2

The frequency of the class preceding the modal class in the following frequency distribution is

 Marks Number of Students 20-30 4 30-40 28 40-50 42 50-60 20 60-70 6
• A 28
• B 32
• C 20
• D 100

#### Question - 3

The number of family members of 30 families of a village is ascending to the following table, Find their mode.

 No. of Members No. of families 2 1 3 2 4 4 5 6 6 10 7 3 8 5
• A 2
• B 4
• C 3
• D 6

#### Question - 4

The formula for finding out the median in a grouped frequency distribution is $1+\frac { \left( \frac { n }{ 2 } -f \right) }{ f } \times h$ What does f represent here?

• A frequency of the class preceding the median class
• B cumulative frequency of the class preceding the median class
• C frequency of the class succeeding the median class
• D cumulative frequency of the class succeeding the median class

#### Question - 5

The weight of 12 men are given as 75, 73, 73, 72, 72, 72, 70, 70, 68, 68, 68, 68, kg. Find the mean weight?

• A 70.75 kg
• B 70.75 g
• C 71.75 kg
• D none of these

#### Question - 6

Determine the mean of the following

 Group 10-16 16-22 22-28 28-34 34-40 Frequency 1 10 5 3 6
• A 24.72
• B 25.77
• C 25.72
• D none of these

#### Question - 7

Following is the distribution of earnings of 200 workers in a flour mill:

 Monthly wages    (in rupees) 80-100 100-120 120-140 140-160 160-180 No.of workers 20 30 20 40 90

Estimate the average earnings of the workers

• A 115
• B 125
• C 135
• D 145

#### Question - 8

Find the missing frequencies, mean of the distribution is 56.

 Class 0-20 20-40 40-60 60-80 80-100 100-120 Total Frequency 16 f1 25 f2 12 10 90
• A 11,15
• B 10,16
• C 11,14
• D 11,16

#### Question - 9

The average weight of A, B, Cis 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, find the weight of B?

• A 21 kg
• B 20 kg
• C 38 kg
• D 31 kg

#### Question - 10

Which of the following relations true?

• A AM=HM
• B GM=AM=HM
• C AM<HM
• D AM≥GM≥HM     