Answer:
The sampling distribution of X is exactly binomial with n = 1200 and p = 0.25
Step-by-step explanation:
For each person surveyed, there are only two possible outcomes. Eithey they support his proposition, or they do not support his proposition. So the sampling distribution of X is exactly binomial.
Binomial probability:
Probability of exactly x sucesses on n repeated trials, with a p probability.
He surveyes 1200 likely voters, so 
He believes he could gain the support of 25% of likely voters. So 
.
The correct answer is:
The sampling distribution of X is exactly binomial with n = 1200 and p = 0.25
Answer:
(-2, -1), (1, 2)
Step-by-step explanation:
The only integer divisors of 2 are 1 and 2. (2 is a prime number, divisible only by 1 and itself.) When listed according to the instructions, they can be positive or negative:
2 = (-2×-1) = (1×2)
Pairs of integer factors are (-2, -1) and (1, 2).
Answer:
The value comes out to be
Step-by-step explanation:
The quadratic equation is an equation containing a single variable of degree 
. Its general form is 
.
The discriminant is the part of the quadratic formula underneath the square root symbol: b²- 4ac. The discriminant tells us whether there are two solutions, one solution, or no solutions.
The equation we are given is :
We know the formula as :
±![\sqrt{b^{2}-4ac}]](https://tex.z-dn.net/?f=%5Csqrt%7Bb%5E%7B2%7D-4ac%7D%5D)
×
±![\sqrt{(-1)^{2} -4(1)(-4)}]](https://tex.z-dn.net/?f=%5Csqrt%7B%28-1%29%5E%7B2%7D%20-4%281%29%28-4%29%7D%5D)
×
±
Since 
≥
Other negative option is neglected
Learn more about quadratic equations - brainly.com/question/1214333
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B = √(13²-7²) = √(169-49) = √120
1+3/5-5/6=30/30+18/30-25/30=23/30
