Answer:
B
Step-by-step explanation:
The Central Limit Theorem (something to look up!) says as the sample size increases, the sample mean approaches the population mean.
Answer:
Step-by-step explanation:
412
Answer:
a) 0.05
b) 0.0526
c) 0.0625
Step-by-step explanation:
Data provided in the question:
Total number of students in a class = 20
a) since it is Monday, no student will be selected already.
Therefore,
There are 20 students from which one can be selected
Thus,
P(Serena is selected on Monday) = 1 ÷ [Number of students available]
= 1 ÷ 20
= 0.05
b) On Tuesday, one student has already been selected on Monday
Therefore,
There are (20 - 1) = 19 students from which one can be selected
Thus,
P(Serena is selected on Tuesday) = 1 ÷ [Number of students available]
= 1 ÷ 19
= 0.0526
c) On Friday , 4 student has already been selected on Monday
Therefore,
There are (20 - 4) = 16 students from which one can be selected
Thus,
P(Serena is selected on Tuesday) = 1 ÷ [Number of students available]
= 1 ÷ 16
= 0.0625
if you're solving for x,
start by isolating x squared to get
x^2 = 16 (we added 8 to both sides)
then square root each side:
sqrt of x^2 = x; sqrt of 16 = 4.
we end up with x = 4 (positive and neg)
if you're factoring
minus 8 from both sides to get
x^2 - 16
from there we can factor to get
(x + 4)(x - 4)