Central Tendency Grouped Data Mean

The score or value where all the other values in a distribution tend to cluster.

• Measure of position

• Central Tendency

• Mean

• Median

What is the second step in identifying grouped mean?

• Find the sum of the resulting column in preceding step.

• Multiply the frequency by the midpoint for each class. Place them in another column.

• Divide the sum obtained in preceding step by the total number of frequencies.

• Find the midpoint for each class (class mark). Place them in a column.

In the formula,  $mean\ =\ \frac{\sum_{ }^{ }f\cdot x_m}{n}$  , What is the meaning of  $x_m$  ?

• frequency

• class boundaries

• tally

• class mark

In the formula,  $mean\ =\ \frac{\sum_{ }^{ }f\cdot x_m}{n}$  What is the meaning of  $f$  ?

• frequency 

• tally

• class mark 

• total number of frequency

What is the class mark with the frequency of 25?

• 69

• 80

• 91

• 102

What will be the frequency if the the class limit is 64-74?

• 6

• 12

• 25

• 14

What is the value of  $f\cdot x_m$  if  $f\ =\ 6\ and\ class\ mark\ =58$  ?

• 9.667

• 64

• -52

• 358

What is the total number of frequency?

• 25

• 80

• 6

• 79

Tags

CCSS.6.SP.B.5

 $What\ is\ the\ value\ of\sum_{ }^{ }f\cdot x_m?$  

• 6087

• 8607

• 6607

• 6807

What is the value of grouped mean if  $\sum_{ }^{ }f\cdot x_m\ =\ 6807\ and\ n\ =\ 80$  rounded in two decimal places?

• 85.00

• 85.09

• 85.10

• 86