3. A group of students was given a special test. The test was completed by various
students in the following duration of time (in minutes)
17, 19, 20, 22, 24, 24, 28, 30, 30, 36
(i) Find the mean time taken by the students to complete the test.
(ii) Find the new mean, if another student who took 14 minutes is also included.
Answers
Answered by
1
Answer:
if 14 is not included than ans. is 25 and when 14 is included than the answer is 24
Answered by
8
1.mean=17+19+20+22+24+24+28+30+30+36
10
=250
10
=25
2.now sum of average mean of 10 students
=250
if one student is added then mean=
250+14=264
11 11
=24
mean=sum of observations
no.of observations
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