Answer:
A) 40/49
B) 36/42
Step-by-step explanation:
Given:
Red Balls, R : 4
White Balls, W : 3
Total Balls : 3+4=7 balls
A) If balls were replaced before the 2nd draw
P (White) = 3/7; P(Red) = 4
P(at least 1 red ball),
= 1 - P(no red balls)
= 1 - P(White, White)
= 1 - (3/7)(3/7)
= 1-(9/49)
= 40/49
A) If balls were replaced before the 2nd draw
P(1st White Ball) = 3/7 ; P(2nd White Ball) = 2/6
P(at least 1 red ball),
= 1 - P(no red balls)
= 1 - P(1st White, 2nd White)
= 1 - (3/7)(2/6)
= 1 - 6/42
= 36/42
Using the interpretation of the confidence interval, the correct option is:
We are 95% confident that those who studied had a higher passing rate than those who did not study.
<h3>What is the interpretation of a x% confidence interval?</h3>
It means that we are x% confident that the population parameter(mean/proportion/standard deviation) is between a and b.
The confidence interval of the difference is:
(0.005, 0.125).
Since the entire interval is positive, the correct option is:
We are 95% confident that those who studied had a higher passing rate than those who did not study.
More can be learned about confidence intervals at brainly.com/question/25890103
#SPJ1
Step-by-step explanation:
Easy:)
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Have a nice day! :)
-Vana
Answer:
15%
Step-by-step explanation:
pretty sure thats right
Answer:
Step-by-step explanation:
f(x)+1 means the graph is moved up by 1
f(x)-1 means it is moved down by 1
f(x+1) means it is moved left by 1
f(x-1) means it is moved right by 1
Keep in mind when it's inside the function it's kinda flipped. since the right is the positive x direction and vice versa.
Anyway, the options show us how the top point is moved. It always starts at (4,1). I will solve the first and leave the others to you, but let me know if yous till need me to walk you through it.
In A the point moves from (4,1) to (4,3) So what does this mean? It means up by 2, since 1 goes to 3. Now, which of the options make the graph move up? the f(x)+1 option. Well, if f(x)+1 makes it go up by 1, then f(x)+2 makes it go up by 2, which is what we want. So A goes with f(x)+2
