Answer:
(29.14 ; 30.06)
Step-by-step explanation:
Given that'
Sample size (n) = 57
Mean (m) = 29.6
Population standard deviation (σ) = 2.7
Confidence interval = 80%
= (1 - 0.8) / 2 = 0.1
Mean ± z * σ/√n
Using the Z probability calculator : Z0. 1 = 1.28
Hence,
29.6 ± 1.28 * (2.7 / √57)
29.6 - (1.28 * 0.3576237) ; 29.6 + (1.28 * 0.3576237)
29.142241664 ; 30.057758336
(29.14 ; 30.06)
Make an equation.
Also, convert 3 weeks into days ⇒ 3 · 7 = 21 days.
x + 2x + 4x = 21
x is Jared.
2x is Max (because half of 4 is 2).
4x is Wesley.
Now solve the equation.
7x = 21
x = 3
Jared = x
Max = 2x
Wesley = 4x
Jared = 3 days
Max = 2(3) = 6 days
Wesley = 4(3) = 12 days
I think the correct answer would most likely be true
