The probability of having type O blood is p=45%. If n=5 people are surveyed we have the binomial table X value 0 1 2 3 4 5 Probability 0.0503 0.2059 0.3369 0.2757 0.1128 0.0185 Find the probability that more than 3 will have type O blood (2 decimal places)
Added by Edward S.
Step 1
** Show more…
Show all steps
Close
Your feedback will help us improve your experience
Narayan Hari and 74 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The most popular blood type is O+ (O positive). The probability of having O+ blood is 0.374. Suppose that a random sample of 5 people show up at a blood drive to donate blood. Using the binomial formula, find the probability exactly 3 of the 5 people who show up at the blood bank have type O+ blood. Fill in the variables you will use below. It is ok to check yourself using stat crunch, but please show how to calculate with the formula. Round to two decimal places. p = q = n = x = Calculate the probability that at least 3 people have type O+ blood when 5 people show up at the blood bank to donate blood. Show your work. When using a binomial distribution, the mean (expected value) of the probability distribution is . Find the expected value (mean) for the number of people that we expect to have type O+ blood when 5 people arrive at the blood bank. (it is ok to have a decimal answer).
Audrey F.
The probability of having blood type A is 0.4. Choose 4 people at random and let X be the number with blood type A. X is a binomial random variable with n = 4 and p = 0.4. Your homework is to: - Find the probability distribution of X the long way: construct an interim table of all possible outcomes in S, the corresponding values of X, and probabilities. - Construct the probability distribution table for X. - Apply the general formula for the probability distribution of a binomial random variable, and see that by using it, we get exactly what we got the long way. For example, find P(X=2) and P(X=4) and compare the results with the ones in the probability distribution table for X. - What are E(X) and sigma x?
Lucas F.
Blood Types The probability that a person in the United States has type $\mathrm{A}^{+}$ blood is $31 \% .$ Three unrelated people in the United States are selected at random. (Source: American Association of Blood Banks) (a) Find the probability that all three have type $A^{+}$ blood. (b) Find the probability that none of the three have type $A^{+}$ blood. (c) Find the probability that at least one of the three has type $A^{+}$ blood. (d) Which of the events can be considered unusual? Explain.
Probability
Conditional Probability and the Multiplication Rule
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD