AP Stats Random
There is a spinner with 14 equal areas, numbered 1 through 14. If the spinner is spun one time, what is the probability that the result is a multiple of 3 or a multiple of 2?
4 multiples of 3, 5 multiples of 2 (no count both) 9/14
If a fair die is rolled 5 times, what is the probability, rounded to the nearest thousandth, of getting at most 2 ones?
Binomcdf because sample size defined and cdf bc "at most" trials (n): 5 P: .166666666666 x-value (how many to get right): 2
If a fair die is rolled 5 times, what is the probability, to the nearest thousandth, of getting exactly 0 twos?
Binompdf because sample size defined and pdf bc exactly trials (n): 5 P: .166666666666 x-value (how many to get right): 0
PROBLEM: If a fair die is rolled 6 times, what is the probability, to the nearest thousandth, of getting exactly 2 twos?
Binompdf because sample size defined and pdf bc exactly trials (n): 6 P: .166666666666 x-value (how many to get right): 2
At LaGuardia Airport for a certain nightly flight, the probability that it will rain is 0.14 and the probability that the flight will be delayed is 0.16. The probability that it will rain and the flight will be delayed is 0.05. What is the probability that it is not raining and the flight leaves on time? Round your answer to the nearest thousandth.
Make table w/rain, no rain, delay, no delay and total is 100
A 2010 study of 240 randomly-selected residents of a subtropical resort city with 82,000 residents found that5.4% of them had been exposed to the mosquito-borne virus that causes Dengue fever. Suppose the actualpercentage of people in the city who have been exposed to the virus is 3%. Let p = the proportion of residentswho have been exposed in a random sample of 240,The standard deviation of p is approximately
The formula is √[p-hat(1 - p-hat)/n]. P-hat in this case is 0.03, so 1 - p-hat = 0.97. √[(0.03 • 0.97)/240] ≈ 0.011011.
The following table represents the highest educational attainment of all adult residents in a certain town. If an adult is chosen randomly from the town, what is the probability that they have a high school degree or some college, but have no college degree? Round your answer to the nearest thousandth.
Total HS: 3569, Total SC: 8045 Add to get 11614 11614 over total of everyone (18248)
The scores of individual students on the American College Testing (ACT) Program composite college entrance examination have an approximately Normal distribution with mean 18.6 and standard deviation 6.0. At Northside High, 36 seniors take the test. Assume that the scores at this school have the same distribution asnational scores.What is the standard deviation of the sampling distribution of mean scores for the 36 students?
b. Let s denote the sample standard deviation. -For a normally distributed population, the sample standard deviation is calculated using the formula;
probability for a or b
p(a)+p(b)-p(a and b)
probability for both a and b
p(a)xp(b)
Spinner w/ 15 equal areas, numbered 1-15. Spun one time. What is probability that result is multiple of 3 AND 5?
# ways true/# ways possible = 1/15
A 2010 study of 240 randomly-selected residents of a subtropical resort city with 82,000 residents found that5.4% of them had been exposed to the mosquito-borne virus that causes Dengue fever. Suppose the actualpercentage of people in the city who have been exposed to the virus is 3%. Let p = the proportion of residentswho have been exposed in a random sample of 240,The mean of p is
.03x240=7.2
