Answer:
answer is i
Step-by-step explanation:
Answer:
Michael is running for president. The proportion of voters who favor him is 0.3. A simple random sample of 100 voters is taken.
a)
What is the expected value :: n*p = 100*0.8 = 80
standard deviation:: sqrt(n*p*q) = sqrt(80*0.2) = 16
where q is proportion of voters who do not favor Michael. (q=0.2)
and shape of the sampling distribution is binomial distribution which is approximately a bell shaped.
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what is the probability that the number of voters in the sample who will not favor Michael will be more than 16
P(X < 16.0) = P((x - 20) / 4.0) < (16.0 - 20) / 4.0) = P(Z < -1.00) = .1587
P(X > 16.0) = 1 - 0.1587 = 0.8413
Answer:
true
Step-by-step explanation:
minus into minus is plus
Answer:
26 16 19 21
Step-by-step explanation:
Answer:
Theoretical Probability: 1/2
Actual Probability: 17/40
Step-by-step explanation:
When you toss a coin, it can land on one of either Heads, or tails. This is a 1 out of 2 (or 1/2) chance of each happening. This is the theoretical probability, since real life will most likely not follow this exactly, as shown by the tests in the question.
In the question, it says that it landed on heads 17/40 times, meaning that the probability is 17/40.
