Answer:
44.16 ; 4.88
Step-by-step explanation:
Recall :
Mean, μ = np
Sample size, n = 96
Sample proportion, p = 0.46
For the mean :
Mean, μ = 96 * 0.46
0.46 * 96 = 44.16
The standard deviation :
σ = √npq
q = 1 - p = 1 - 0.46 = 0.54
σ = √npq = √(96 * 0.46 * 0.54)
σ = √23.8464
σ = 4.88
Answer:
13.5% Decrease
Step-by-step explanation:
Use formula (change in value / original value) * 100
Change in value = 3.70 - 3.20 =0.50 Change in value is 0.50
Original Value = 3.70
Use the formula (0.50/3.70) * 100 = 13.5 % Decrease
Answer: Each student should raise $225
Step-by-step explanation:
$12,500-$1,250= $11,250
$11,250/50= $225
Check answer:
$225x50= $11,250
The constant of proportionality is 13
