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Step-4

Title: Mean for grouped data

Grade: 9-a Lesson: S1-L4

Explanation: Hello Students, time to practice and review the steps for the problem.

Step	Type	Explanation	Answer
1	Problem	From the given observations.Find the mean $4$
2	Formula:	Mean = \$(\sumx_i f_i) / (\sumf_i) \$
3	Step	Assume midpoints of Number of order	\$x_i\$
4	Step	Then frequency	\$f_i\$
5	Step	$1$
6	Step	From the above table	\$f_i = 40\$,\$x_i f_i = 1220\$
7	Step	Mean	\$1220/40 = 30.5\$
8		Answer	C = 30.5

Step

Type

Explanation

Answer

Problem

From the given observations.Find the mean
$4$

Formula:

Mean = \$(\sumx_i f_i) / (\sumf_i) \$

Step

Assume midpoints of Number of order

\$x_i\$

Step

Then frequency

\$f_i\$

Step

$1$

Step

From the above table

\$f_i = 40\$,\$x_i f_i = 1220\$

Step

Mean

\$1220/40 = 30.5\$

Answer

C = 30.5

Tutor: Questions

Seq	Type	Question
1	Problem	What did you learn from this problem?
2	Clue	What did you learn from the clues?
3	Hint	What did you learn from the Hints?
4	Step	What did you learn from the Steps?
5	Step	How can we improve the Steps?

Seq

Type

Question

Audio

Problem

What did you learn from this problem?

Clue

What did you learn from the clues?

Hint

What did you learn from the Hints?

Step

What did you learn from the Steps?

Step

How can we improve the Steps?