Answer:
(a) Margin of error ( E) = $2,000 , n = 54
(b) Margin of error ( E) = $1,000 , n = 216
(c) Margin of error ( E) = $500 , n= 864
Step-by-step explanation:
Given -
Standard deviation = $7,500
= 1 - confidence interval = 1 - .95 = .05
= = 1.96
let sample size is n
(a) Margin of error ( E) = $2,000
Margin of error ( E) =
E =
Squaring both side
n = 54.0225
n = 54 ( approximately)
(b) Margin of error ( E) = $1,000
E =
1000 =
Squaring both side
n = 216
(c) Margin of error ( E) = $500
E =
500 =
Squaring both side
n = 864
The answer to this question is 23
Answer:
9/8 or 1.125
Step-by-step explanation:
10 1/2 ÷ 9 2/6
= 21/2 ÷ 56/6
= 9/8
= 1.125
=》 See the attachment.
Hope it helps ⚜
Answer:
probably the furthest graph to the left.
Step-by-step explanation:
seems like a 25% 10% split.
Answer:
Y = 15sqrt(3)/4
Z = 15sqrt(3)/2
b = 45/4
Step-by-step explanation:
Sin(60) =Z/15
sqrt(3)/2 = Z/15
Z = 15sqrt(3)/2
Sin(30) = Y/Z
½ = Y/Z
Y = ½(15sqrt(3))/2 = 15sqrt(3)/4
Cos(30) = b/Z
sqrt(3)/2 = b/Z
b = 15sqrt(3)/2 × sqrt(3)/2
b = 45/4
sqrt is square root/radical