Let X is a random variable shows the number of left handed people. Here X has binomial distribution with parameters n=20 and p=0.10.
(a)
The probability that fewer than 2 of them are left handed is
(b)
Here we have
p = 0.1, n=200
The sampling distribution of sample proportion will be approximately normal with mean
and standard deviation
The z-score for is
The required probability is
2. Suppose that 10% of the general population is left-handed (a) We randomly sample 20 individuals....
The proportion of left-handed people in the general population is about 0.10.1. Suppose a random sample of 225225 people is observed. Curve 2 . -10 - Curve 3 - Curve 4 Curve 5 20 Find the probability using the normal table. (Opens in new window) P(P >0.13) = P(z > 1.5) = (Click to view hint) Check Your Turn np = 22.5 The proportion of left handed people in the general population is about 0.1. Suppose a random sample of...
The proportion of left-handed people in the general population is about 0.1. Suppose a random sample of 225 people is observed. The proportion of left-handed people in the general population is about 0.1. Suppose a random sample of 225 people is observed. Using our 'rule of thumb; can we use normal approximation values for this sampling distribution? Yes + np = 22.5 and ng= (Click to view hint) What is the mean of the sample proportion? др (Click to hide...
3. The Jordan Sports Equipment Company finds that 10% of the general population is left-handed. Use the binomial table or formula (bottom) as appropriate in answering the following questions. (a) If 20 people are randomly selected, find the probability that exactly 3 of them are left-handed. (b) If 8 people are randomly selected, find the probability that at least one of them is left-handed.
fouTube Maps Your Turn The proportion of left-handed people in the general population is about 0.1. Suppose a random sample of 225 people is observed Using our "rule of thumb." can we use normal approximation values for this sampling distribution? No • * * and nq = 98 * (Click to view hint) What is the mean of the sample proportion? * (Click to view hint) np = 7 My = 768 What is the standard error? = 76 *...
s. Assume that 10% of the adult population is left-handed. If 50 adults are randomly selected, use normal approximation to find the probability that more than 12 are left-handed. Round answer to four decimal places. (4 pts)
Assume that that 10% of adults are left-handed. If 300 adults are randomly selected, find the probability that 27or fewer of them are left-handed. Does the result of 27left-handed adults appear to be unusually low? The probability that 27or fewer are left-handed is
suppose that 16% of the population of the US is left-handed. If a random sample of 240 people from the US is chosen, approximate The probability that more than 39 or left-handed. Use the normal approximation to the by no meal with the correction for continually. Round your answer to that lease three decimal places do not round any intermediate step
1 2 Suppose that 10% of the population of the U.S. is left-handed. If a random sample of 155 people from the U.S. is chosen, approximate the probability that at least 16 are left-handed. Use the normal approximation to the binomial with a correction for continuity. Round your answer to at least three decimal places. Do not round any intermediate steps. (If necessary, consult a list of formulas) Х $ 2 e
In Uganda only 9% of the population has access to electricity. Suppose we randomly sample 20 people in Uganda. Let X be the number of people in our sample who have access to electricity. (a) What distribution will X have? (Hint: X only takes on the values 0, 1, ... 19, 20, so it can’t be a continuous distribution.) (b) Find the mean and standard deviation for X . ( c) Find the probability that 10 people or less in...
Suppose that 12% of the population of the U.S. is left-handed. If a random sample of 130 people from the U.S. is chosen, approximate the probability that at most 14 are left-handed. Use the normal approximation to the binomial with a correction for continuity. Round your answer to at least three decimal places. Do not round any intermediate steps. (If necessary, consult a list of formulas.) x 5 ?