3 Notes StatsAll changes saved in Driveew Insert Format Tools Add-onsHelpcoBIUAHeading 1100%Comic San...116234rData: One hundred undergraduates reported the number of hours they worked perweek. The data is presented below in a frequency table. Calculate the mean.CumulativeFrequencyfmMidpoint (m)Number ofHoursStudentsWorked24O-91410-193920-291830-39540-49N-100Standard Deviation (Grouped Data)Σίw-x)-Vf(m-x)Σfimn-1

Question
Asked Sep 19, 2019

I don’t understand what to do with this table. 

3 Notes Stats
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co
BIUA
Heading 1
100%
Comic San...
11
6
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4
r
Data: One hundred undergraduates reported the number of hours they worked per
week. The data is presented below in a frequency table. Calculate the mean.
Cumulative
Frequency
fm
Midpoint (m)
Number of
Hours
Students
Worked
24
O-9
14
10-19
39
20-29
18
30-39
5
40-49
N-100
Standard Deviation (Grouped Data)
Σίw-x)-
V
f(m-x)
Σfim
n-1
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3 Notes Stats All changes saved in Drive ew Insert Format Tools Add-ons Help co BIUA Heading 1 100% Comic San... 11 6 2 3 4 r Data: One hundred undergraduates reported the number of hours they worked per week. The data is presented below in a frequency table. Calculate the mean. Cumulative Frequency fm Midpoint (m) Number of Hours Students Worked 24 O-9 14 10-19 39 20-29 18 30-39 5 40-49 N-100 Standard Deviation (Grouped Data) Σίw-x)- V f(m-x) Σfim n-1

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check_circleExpert Solution
Step 1

In this context, the aim is to calculation mean.

Step 2

Mean:

The general formula to obtain the mean of a grouped data is,

Mean = (∑fm)/N

Step 3

The below table shows the calculation to find the mean:

  • First column of the table represents class interval.
  • Second column of the tabl...
Hours worked Number of studentsMid-point fm
Cumulative frequency
0-9
24
4.5
108
108
203
10-19
14
14.5
311
955.5 1266.5
24.5
20-29
39
30-39
18
34.5
621
1887.5
44.5
40-49
5
222.5 2110
Σ i-2110
N 100
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Hours worked Number of studentsMid-point fm Cumulative frequency 0-9 24 4.5 108 108 203 10-19 14 14.5 311 955.5 1266.5 24.5 20-29 39 30-39 18 34.5 621 1887.5 44.5 40-49 5 222.5 2110 Σ i-2110 N 100

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