The numbers of hours worked (per week) by 420 statistics students are shown below. Number of Hours Frequency 0 s x < 10 10 sx < 20 20 s x < 30 30 s x < 40 10 100 220 90 The midpoint of the last class is O a. 34 O b. 35 O c. 50 O d. 34.5

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The numbers of hours worked (per week) by 420 statistics students are shown below.
Number of Hours
Frequency
0sx< 10
10
10 sx< 20
100
20 <x< 30
220
30 < x < 40
90
The midpoint of the last class is
О а. 34
О Б. 35
О с. 50
O d. 34.5
Transcribed Image Text:The numbers of hours worked (per week) by 420 statistics students are shown below. Number of Hours Frequency 0sx< 10 10 10 sx< 20 100 20 <x< 30 220 30 < x < 40 90 The midpoint of the last class is О а. 34 О Б. 35 О с. 50 O d. 34.5
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