Answer:
12
Step-by-step explanation:
·×
=
=12
A recent personalized information sheet from your wireless phone carrier claims that the mean duration of all your phone calls w
as μ = 2.9 minutes with a standard deviation of σ = 1.9 minutes. From a random sample of n = 50 calls, your parents computed a sample mean of 
= 3.6 minutes and a sample standard deviation of s = 2.6 minutes.
Sketch the population distribution for the duration of your phone calls. What are its mean and standarddeviation?
Sketch the population distribution for the duration of your phone calls. What are its mean and standarddeviation?
1 answer:
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Answer:
Standard deviation of given data = 3.16227
Step-by-step explanation:
<u><em>Step(i)</em></u>:-
Given sample size 'n' = 5
Given data 4, 6,8,10,12
Mean of the sample x⁻ = 8
Standard deviation of the sample
<u><em>Step(ii)</em></u>:-
Given data
x : 4 6 8 10 12
x-x⁻ : 4 - 8 6-8 8-8 10-8 12-8
(x-x⁻) : -4 -2 0 2 4
(x-x⁻)² : 16 4 0 4 16
S.D = √10 = 3.16227
<u><em> Final answer</em></u>:-
The standard deviation = 3.16227