Answer: 31
Step-by-step explanation:
Formula to find the sample size is given by :_

, where z*= critical value corresponds to confidence level.
= population standard deviation.
E= Margin of error.
As per given , we have

E=1
We know that critical value corresponding to 95% confidence level = z*=1.96
Then, the required sample size would be :



Hence, the required minimum sample size = 31
Answer:
C is the answer
Step-by-step explanation:
hope this helps
Answer:
-8
Step-by-step explanation:
7-7=0 remainder is 8 so minus 8 to zero -8
Answer:
Upper Quartile / Q1 = 82
Lower Quartile / Q3 = 93
Step-by-step explanation:
The data we are given with is :
84 84 92 92 95 94 80 72
Let us first arrange the data in ascending order
72 80 84 84 92 92 94 95
The Formula to find the Quartile is
Quartile For Q1/Upper
term
n=8
term
term
2.25 term
This means that Quartile for Q1 is average of 2nd and 3rd term
2nd term = 80 , 3rd term = 84
Average = 
= 82
Quartile For Q3/Lower Quartile
term
n=8
term
term
= 6.75
Hence the Quartile for Q3 will be the average of the 6th and 7th term
6th term = 92
7th term = 94
Average= 
= 93
Hence Upper Quartile / Q1 = 82
Lower Quartile / Q3 = 93