Answer: 208.
Step-by-step explanation:
The formula to find the minimum sample size is given by :-
(1)
, where z* = critical z-value (two tailed).
= Standard deviation ( from prior study ) and E = Margin of error.
As per given , we have
Margin of error : E= 0.29
Confidence level = 85%
Significance level =
Using z-table , the critical value (two -tailed)=
As per previous study , Variance =
Now, the required minimum sample size = 
[Substitute the values in formula (1)]
[ Round to the next integer]
Hence, the minimum number of third graders that must be included in a sample = 208.
Answer:
80 in each group
Step-by-step explanation:
554+47 = 601 (47 last month)
601+39 = 640 (39 this month)
640 / 8 = 80 (8 equal groups)
Answer:
A.
In 4231, the value of the digit 3 is 110 less than the value of the digit 3 in 3421.
Step-by-step explanation:
We can see that the value of 3 In 4231 is in ten while the value of 3 in 3421 is in thousands.
So to get the actual division factor, let's take 3300 and divide it by 30,
3300/30 = 110
So it's clear already, that the value of 3 in 4231 is 110 times less to the value in 3421
Answer:
18 nickels, 6 dimes, and 9 quarters
Step-by-step explanation:
nickels dimes and quarters
x y and z
x+y+z=33
y+3=z
3y=x
3y+y+y+3=33
5y+3=33
5y=30
y=6
z=9
x=18
Hope this helps plz hit the crown :D
Answer:
X is greater than or equal to 2 or X > 1
