High school probability Uncovered: Discover the Secrets with Plainmath's Expert Help
Brittney Lord 2021-09-01There four foreign nationals in a group of fifteen people. Four people are chosen at random.
waigaK 2021-09-01Jenny sells ‘honey tea’ to raise fund for homeless people. The probability of making a sale is, independently, 0.3 for each person she approaches.
What is the probability that she will makes 4 sales before the seventh person she
approaches?
What is the probability that she will makes 4 sales before the seventh person she approaches?
Brittney Lord 2021-09-01The probability that an automobile being filled with gasoline will also need an oil change is 0.35. the probability that it needs a new oil filter is 0.45. and the probability that both the oil and filter need changing is 0.25.
If a new oil filter is needed, what is the probability that the oil has to be changed ?
If a new oil filter is needed, what is the probability that the oil has to be changed ?
Ernstfalld 2021-08-31What is the probability of 24 succeses? p=.20 and n=100
Nannie Mack 2021-08-31 An advertising agency is conducting a survey to after introducing a fruit drink in the market.
As per the survey about 60 % of the people like the drink.
If we randomly select 10 people,
using Binomial probability distribution, find the probability that
a) at least 8 people like the drink.
b) at most 3 people like the drink
As per the survey about 60 % of the people like the drink.
If we randomly select 10 people,
using Binomial probability distribution, find the probability that
a) at least 8 people like the drink.
b) at most 3 people like the drink
Bergen 2021-08-30A binomial random variable has mean 1.8 and variance 1.44. Determine complete binomial probability distribution.
preprekomW 2021-08-30A binomial probability experiment is conducted with the given parameters. Compute the probability of x successes in the n independent trials of the experiment.
n=20,
p=0.7,
x=19
P(19)=
Dolly Robinson 2021-08-23Mr. Kram is considering running for mayor of the land of the dawn.
Before completing the petitions, he decided to conduct a survey of voters in the land of dawn.
A sample of 400 voters reveals that 300 would support him in the May Election.
Develop a 99 percent confidence interval for the population proportion.
Sinead Mcgee 2021-08-23A gambling book recommends the following “winning strategy” for the game of roulette:
Bet $1 on red. If red appears (which has probability ,then take the $1 profit and quit.
If red does not appear and you lose this bet ( which has probability of occurring), make additional $1 bets on red on each of the next two spins of the roulette wheel and then quit.
Let X denote your winnings when you quit.
(a) Find P{X>0}.
(b) Are you convinced that the strategy is indeed a “winning” strategy?
(c) Find E[X].
A gambling book recommends the following “winning strategy” for the game of roulette:
Bet $1 on red. If red appears (which has probability ,then take the $1 profit and quit.
If red does not appear and you lose this bet ( which has probability of occurring), make additional $1 bets on red on each of the next two spins of the roulette wheel and then quit.
Let X denote your winnings when you quit.
(a) Find P{X>0}.
(b) Are you convinced that the strategy is indeed a “winning” strategy?
(c) Find E[X].
Wribreeminsl 2021-08-22The seller of a loaded die claims that it will favor the outcome 6. We dont
Lipossig 2021-08-22At Western University the historical mean of scholarship examination scores for freshman
applications is 900. Ahistorical population standard deviation
Each year, the assistant dean uses a sample of applications to determine whether the mean
examination score for the new freshman applications has changed.
a. State the hypotheses.
b. What is the 95% confidence interval estimate of the population mean examination
score if a sample of 200 applications provided a sample mean
c. Use the confidence interval to conduct a hypothesis test. Using
d. What is the p-value?
Each year, the assistant dean uses a sample of applications to determine whether the mean examination score for the new freshman applications has changed.
a. State the hypotheses.
b. What is the 95% confidence interval estimate of the population mean examination score if a sample of 200 applications provided a sample mean
c. Use the confidence interval to conduct a hypothesis test. Using
d. What is the p-value?
Carol Gates 2021-08-22When system reliability is increased through redundant or backup components, the redundancy principle is applied.
Assume that your alarm clock has a 0.975 probability of working on any given morning.
With one alarm clock, you have a 0.975 probability of being awakened.
What is the probability of being awakened if you use two alarm clocks?
When system reliability is increased through redundant or backup components, the redundancy principle is applied.
Assume that your alarm clock has a 0.975 probability of working on any given morning.
With one alarm clock, you have a 0.975 probability of being awakened.
What is the probability of being awakened if you use two alarm clocks?
Tammy Todd 2021-08-22The probability density function of the net weight in pounds of a packaged chemical herbicide is
a. Determine the probability that a package weighs more than 50 pounds.
b. How much chemical is contained in 90% of all packages?
The probability density function of the net weight in pounds of a packaged chemical herbicide is
a. Determine the probability that a package weighs more than 50 pounds.
b. How much chemical is contained in 90% of all packages?
FizeauV 2021-08-22Express the confidence interval using the indicated format. (Based on the percentages of red, orange, yellow, and blue MMs, the confidence intervals are calculated.)
Express 0.0434<p<0.217 in the form of
Express the confidence interval using the indicated format. (Based on the percentages of red, orange, yellow, and blue MMs, the confidence intervals are calculated.)
Express 0.0434<p<0.217 in the form of
generals336 2021-08-21A closet contains 10 pairs of shoes.
If 8 shoes are randomly selected, what is the probability that there will be
(a) no complete pair?
(b) exactly 1 complete pair?
If 8 shoes are randomly selected, what is the probability that there will be
(a) no complete pair?
(b) exactly 1 complete pair?
Elleanor Mckenzie 2021-08-21Find the following probabilities for the standard normal variable z:
(a)
(b)
(c)
Find the following probabilities for the standard normal variable z:
(a)
(b)
(c)
Falak Kinney 2021-08-19Let X represent the difference between the number of heads and the number of tails obtained when a coin is tossed n times.
What are the possible values of X?
What are the possible values of X?
FizeauV 2021-08-19Based on the Normal model N(100, 16) describing IQ scores, what percent of peoples
cistG 2021-08-19Suppose that two defective refrigerators have been included in a shipment of six refrigerators.
The buyer begins to test the six refrigerators one at a time.
What is the probability that the last defective refrigerator is found on the fourth test?
The buyer begins to test the six refrigerators one at a time.
What is the probability that the last defective refrigerator is found on the fourth test?
Lennie Carroll 2021-08-18Explain how the value of n, the number of trials in a binomial experiment, affects the shape of the distribution of a binomial random variable.
