mustish1
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Cumulative Frequency
They are total 24 numbers. I dont know how do i calculate first the frequency and then cumulative frequency when their is no duplications in the data set. Need help Thanks.
A website recently reported that salaries of Chief Finance Officers (CFOs) ranged from $127,735 to $209,981 (before bonuses). Suppose the data below represent a sample of the annual salaries for 24 CFOs in thousands of dollars.
Using 99 classes, construct a cumulative frequency distribution. (Use the minimum class width, rounded up to the nearest integer. Start the first class at 130.)
CFO Salary (thousands of dollars) Cumulative Frequency
and under
and under
and under
and under
and under
and under
and under
and under
and under
130.8, 131.1, 132.3, 138.1, 140.2, 145.8, 156.1, 159.4, 160.3, 161.4, 163.8, 165.3, 167.5, 168.4, 170.9, 176.4, 179.9, 193.8, 194.5
196.4, 198.8, 201.2, 204.5, 206.4
A website recently reported that salaries of Chief Finance Officers (CFOs) ranged from $127,735 to $209,981 (before bonuses). Suppose the data below represent a sample of the annual salaries for 24 CFOs in thousands of dollars.
Using 99 classes, construct a cumulative frequency distribution. (Use the minimum class width, rounded up to the nearest integer. Start the first class at 130.)
CFO Salary (thousands of dollars) Cumulative Frequency
and under
and under
and under
and under
and under
and under
and under
and under
and under
130.8, 131.1, 132.3, 138.1, 140.2, 145.8, 156.1, 159.4, 160.3, 161.4, 163.8, 165.3, 167.5, 168.4, 170.9, 176.4, 179.9, 193.8, 194.5
196.4, 198.8, 201.2, 204.5, 206.4
ASKER
I am sorry typing mistake. its 9
ASKER
if i go with 2 Power K >= (What will be the number on right side?)
ASKER
IS THIS IS CORRECT?
the width is 24 so
2 Power 5 = 24
the width is 24 so
2 Power 5 = 24
They tell you to use 9. Maybe they just want you to check that this is more than the minimum number (which is 5).
But 9 is the nice round number choice which lets you use $10K ranges from $130K to $210K.
But 9 is the nice round number choice which lets you use $10K ranges from $130K to $210K.
ASKER
Can you please help me in creating a table? I can calculate the cumulative frequency by myself.
There are nine classes. The first one goes from $130K to $140K.
Hav many values are in this class?
What is the next class?
Also remember that this is a cumulative table.
Hav many values are in this class?
What is the next class?
Also remember that this is a cumulative table.
ASKER
I dont know how to make 9. They are total 8
Classes Frequency Cumulative
$130K to $140K 5 5/24
$141K to $150K 1 1/24
$151K to $160K 3 3/24
$161K to $170K 6 6/24
$171k to $180k 2 2/24
$181k to $190k 0 0
$191k to $200k 4 4/24
$201k to $210k 3 3/24
-------------
Total 24
Classes Frequency Cumulative
$130K to $140K 5 5/24
$141K to $150K 1 1/24
$151K to $160K 3 3/24
$161K to $170K 6 6/24
$171k to $180k 2 2/24
$181k to $190k 0 0
$191k to $200k 4 4/24
$201k to $210k 3 3/24
-------------
Total 24
ASKER
I DONT KNOW IF THIS ONE IS RIGHT
-------------------------- ---------- ---------- ------
But according to 2k formula: 2 Power 5 = 24 ---> 15.12 so the range is 15 not 9
so there should be no more than 5 classes not 9.
Classes Frequency Cumulative
$130K to $145K 6 6/24
$146K to $171K 9 9/24
$172K to $187K 2 2/24
$188K to $203K 5 5/24
$204k to $219k 2 2/24
-------------
Total 24
--------------------------
But according to 2k formula: 2 Power 5 = 24 ---> 15.12 so the range is 15 not 9
so there should be no more than 5 classes not 9.
Classes Frequency Cumulative
$130K to $145K 6 6/24
$146K to $171K 9 9/24
$172K to $187K 2 2/24
$188K to $203K 5 5/24
$204k to $219k 2 2/24
-------------
Total 24
ASKER
But in the question it says 9 classes.
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ASKER
Thanks.
What does the 2^k GTE 24 guideline suggest?