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Refer to the following breakdown of responses to a survey of How confident are you that you saved enough to retire? Response Frequency Very confident

Refer to the following breakdown of responses to a survey of "How confident are you that you saved enough to retire?"

Response Frequency
Very confident 63
Somewhat confident 135
Not very confident 99
Don't know 3

What is the class interval for the preceding frequency table?

Multiple Choice

None apply

40

20

10

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