Answer:
(a) and
(b) The sample variance is and the sample standard deviation is
Step-by-step explanation:
(a)
The sum of these 17 sample observations is
and the sum of their squares is
(b)
The sample variance, denoted by , is given by
where
Applying the above formula we get that
The sample standard deviation, denoted by <em>s</em>, is the (positive) square root of the variance:
Applying the above formula we get that
Answer:
B
Step-by-step explanation:
B is the correct answer. Since Mrs. Hooper and Mr. Anderson had to call a total of 8 parents, you know the first equation must be either A or B (H + A = 8).
Since you know that Mrs. Hooper had to call 2 more parents than Mr. Anderson, the equation will have to have H + 2 on one side; that's how you know the correct answer is B.
The answer is 25 because when you count by 5's you would get 25 I'll show you 5 10 15 20 25 I hope this helps you
we know that
Sine or Cosine of a Half Angle is giving by the formulas
step 1
Find the value of Sin(30)
so
substitute the given values
cos(60)=1/2
step 2
Find the value of Cos(30)
substitute the given values in the formula above
step 3
Find the value of Cot(60)
REmember that
Cot=cos/sin
so
substitute
cot(60)=cos(60)/sin(60)
cot(60)=(1/2)/(V3/2)=V3/3
Desmos trust me, it’s way more easier that way