The margin of error of a sample is given by:
B = z(α/2) σ/√n; where B is the margin of error = 25, z(α/2) is the level of significant = 1.96, σ is the standard deviation = 100 and n is the sample size.
25 = 1.96(100/√n)
100/√n = 25/1.96 = 12.76
√n = 100/12.76 = 7.84
n = (7.84)^2 = 61.47
Therefore, the smallest sample size required is 62 seniors.
Answer:
See below.
Step-by-step explanation:
(Given)
(Subtracted 3 on both sides)
(Subtracted ax on both sides)
(Factor out x from x - ax)
(Divided 1 - a on both sides)
Answer:
The slope should be -11 and the points should be (6,84)
Step-by-step explanation:
Answer:
- Balance in account after 5 years = $9,243.75
- Interest earned at end of 5 years = $1,743.75
Step-by-step explanation:
The total amount saved in a simple interest account at the end of 5 years is given by;
= Principal (1 + Interest rate * time )
= 7,500 ( 1 + 4.65% * 5)
= $9,243.75
Total Interest earned;
= 9,243.75 - 7,500
= $1,743.75
Answer: 59.3% im pretty sure
Step-by-step explanation:
