The table below shows the time, t minutes, spent by 20 children to complete the highest level in a compute game Time (min) Frequency (f) Ost< 5 5st< 10 10 st< 15 15 st< 20 2x a) Find the value of x and calculate an estimate of the mean time. b) Find the modal class. c) If we choose at random a child, then find the probability that this child spent less than 5 minutes.

The table below shows the time, t minutes, spent by 20 children to complete the highest level in a compute game Time (min) Frequency (f) Ost< 5 5st< 10 10 st< 15 15 st< 20 2x a) Find the value of x and calculate an estimate of the mean time. b) Find the modal class. c) If we choose at random a child, then find the probability that this child spent less than 5 minutes.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section4.6: Regression And Median-fit Lines

Problem 2CYU

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Question

Answer this question.

• Task 5 (P5 & P6):
The table below shows the time, t minutes, spent by 20 children to complete the highest level in a computer
game
Time (min)
Frequency (f)
0st< 5
5st< 10
6
10 st< 15
15 <t< 20
2x
a) Find the value of x and calculate an estimate of the mean time.
b) Find the modal class.
c) If we choose at random a child, then find the probability that this child spent less than 5 minutes.

Expert Solution

Step 1

Given Data:

The total number of students is: 20

Time	Frequency
0≤t<5	x
5≤t<10	6
10≤t<15	8
15≤t<20	2x

Step 2

(a)

The sum of frequency is equals to the total number of students.

Thus, the value of 'x' is 2.

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