First, you have to get the equation to the normal form of a line. To do this, you divide both sides by -6 to get 
. The y-intercept is at -4 and your slope is 2/3. Use this to graph the equation.
At the World Cup, 25% of the teams are from South American countries. If there are 40 teams in the World Cup, how many are from
2 answers:
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Answer:
Step-by-step explanation:
Hello!
The variable of interest is
X: Number of people that feel vulnerable to identity theft in a sample of 929.
This variable is discrete and has a binomial distribution. X~Bi(n;p)
The parameter of interest is the population proportion of people that feel vulnerable to identity theft.
To calculate the 99% CI for the population proportion you have to use the approximate distribution to normal for the sample proportion p'≈N(p; )
a. The best point estimate for p is the sample proportion p' you calculate it as:
p'= x/n= 523/929= 0.56
b. The formula for the confidence interval is
p' ±
Where is the margin of error
In this case
c. Then the interval is
0.56 ± 0.04
[0.52;0.6]
d.
With a 99% confidence level, you can expect that the interval [0.52;0.6] will include the true value of the proportion of people that feel vulnerable to identity theft.
The correct answer is
3. there is a 99% chance that the true value of the population proportion will fall between the lower bound and the upper bound.
I hope this helps!