The table shows information about the times, $$$t$$$ seconds, taken by each of 100 students to solve a puzzle. Calculate an estimate of the mean time. $$$................\mathrm{s}$$$

Mathematics

IGCSE&ALevel

CAIE

Exam No：0580_w20_qp_23 Year：2020 Question No：22(a)

Answer:

$27.625$

E9.5.1 Calculate an estimate of the mean for grouped and continuous data.

E9.5.2 Identify the modal class from a grouped frequency distribution.

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