Step-by-step explanation:
Let U=universal set
C=students who drink coke
P = students who drink pepsi
15.87% of the population does not meet the minimum standards.
We use z-scores to find this probability:
z=(X-μ)/σ = (85-100)/15 = -15/15 = -1
Using a z-table (http://www.-table.com) we see that the area to the left of, less than, this is 0.1587. This is 15.87%.
D=sqrt[(x1-x2)^2+(y2-y1)^2]
(0,10) x1=0 y1=10 and (-9,1) x2=-9 y2=1
now d=sqrt[(-9-0)^2+(1-10)^2]=12.72792206 units
Answer:
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Answer: 1308
Step-by-step explanation:
Given : Level of confidence = 0.97
Significance level : 
Critical value : 
Margin of error : 
If prior proportion of population is unknown , then the formula to find the population proportion is given by :-


Hence, the minimum sample size needed =1308