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
-7.4, -.6 repeating, .6, .75 I hope I helped
Answer: 10 minutes
Step-by-step explanation:
1. Jonathan can type 20 documents in 40 minutes (20/40=1/2 per minute), Susan can type it in 30 minutes (20/30=2/3 per minute) and Jack can type it in 24 minutes (20/24=5/6 per minute), then you must add them to obtain the number of pages they wan write in 1 minute working together:
2. Then, the time will it take them type the same document of 20 pages is:
Store two. It had better prices when you multiply the recipients
Answer:
5.90551
Step-by-step explanation: