Answer: 400
Step-by-step explanation:
From the question, we see that population proportion (p) = 0.15
Margin of error (m) = 5%
Confidence level = 99%
Level of significance = 100- confidence level = 1%.
The population standard deviation (s) for this data set is
√p(1-p) = √ 0.15 × (1 - 0.15)
√ 0.15 × 0.85 = 0. 1275
Margin of error = critical value × population standard deviation / √n
The critical value (c) for Constructing a 99 % confidence interval for population mean is = 2.58
m = c× √p'(1-p') /√n
We want to make n subject of the formulae, we have that
m = c√p'(1-p') /√n
m×√n = c × √p'(1-p')
√n = c × √p'(1-p') / m
n = c² × {√p'(1-p')}² / m
n = 2.58² × 0.1275/ 0.05²
n = 6.6564 × 0.01625625 / 0.0025
n = 339.47 ~ 400
Answer:
This equation is equal to y=3/2x-2
Step-by-step explanation:
The 17500 job will pay tax of (17500-5700-3650)=8150*0.10=815
The 18000 job will pay tax of 8350*0.10+300*0.15=880
The difference in pay is therefore 500-(880-815)=$435
First change the mixed number into a fraction greater than one 1 1/2= 3/2, then divide 2 into 3 which results in 1.5
