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Probability

12/18/21

Probability of independent events: Decimal answers

A student ran out of time on a multiple-choice exam and randomly guessed the answers for two problems. Each problem had 4 answer choices – a, b, c, d – and only one correct answer. What is... more

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Probability

12/18/21

Probability of independent events: Decimal answers

At a local college, 245 of the male students are smokers and 245 are non-smokers. Of the female students, 180 are smokers and 420 are non-smokers. A male student and a female student from the... more

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Probability

12/18/21

Probabilities of draws without replacement

An urn contains 5 red balls and 7 orange balls. If Tim chooses 6 balls at random from the urn, what is the probability that he will select 4 red balls and 2 orange balls? Round your answer... more

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Probability Statistics

12/18/21

Let n1 =100, x1=60 , n2 =100, and x2=80 . Complete part (b) below.

Calculate the test statistic, ZSTAT, based on the difference p1−p2.The test statistic, ZSTAT, is negative 3.09−3.09.(Type an integer or a decimal. Round to two decimal places... more

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Probability Statistics

12/17/21

According to a recent report, 44% of college student internships are unpaid. A recent survey of 100 college interns at a local university found that 49 had unpaid internships.

a. Use the five-step p-value approach to hypothesis testing and a 0.01 level of significance to determine whether the proportion of college interns that had unpaid internships is different from... more

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Probability Statistics

12/17/21

In a one-tail hypothesis test where you reject only in the lower tail, what is the if zstat = +1.08

What is the P vlaue?

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Probability Statistics Stats

12/16/21

Probability Question

A thermostat is set on 70 degrees. A room temperature is distributed normally with the standard deviation of .1. What is the probability that the room temperature will be higher than 70.2 degrees?

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Probability

12/16/21

What is the probability that both of the people you interview are women?

Twelve women and fourteen men have applied for a job posting. You are responsible for interviewing applicants. Assume that you are selecting two applicants at random for an interview. Draw a tree... more

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Probability Math Algebra Highschool Math

12/16/21

Determine the probability of randomly selecting a green piece of clothing or a jacket.

3) A basket contains 4 red Santa hats, 6 green Elf hats, 5 red jackets, and 7 green jackets. Determine the probability of randomly selecting a green piece of clothing or a jacket. (A)... more

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Probability Statistics Maths

12/16/21

If the height of students in one school follows a normal distribution with a mean of 160 cm and a standard deviation of 5 cm. What is the percentage of the students with a height of 155-165 cm?

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Probability

12/15/21

Probability Practice Questions

Show that if X and Y are independent random variables, then Var(X+Y)= Var(X)+Var(Y).

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Probability Statistics

12/14/21

Statistics question

2) The number of auto parts that a company produces follows a normal distribution. The company has two independent production lines: Line 1 produces an average of 75 parts per day with a... more

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Probability Statistics

12/13/21

A test was given to a group of students. The grades and major are summarized below. (New to this so full questions is uploaded to this screenshot) https://prnt.sc/22v7ooq

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Probability Math Geometry Algebra

12/13/21

Joselyn and Tanya are on a swim team. The table below shows the probabilities of the team winning or losing when the team is playing away or is playing at home.

Are the events “winning” and “playing at home” independent? (5 points) Show all of your work proving your statement ... more

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Probability Discrete Math Expected Number Discrete Mathematics

12/13/21

Expected number of becoming good friends

Consider a group of people. There are 500 people in the a room. If we put them altogether inside a room for 1 hour, each pair of people has a 1 in 10000 chances of making friends together and... more

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Probability Math

12/13/21

Assigning Probability

Let S be the sample space for when a coin is flipped 8 times in a row and heads or tails isrecorded, but we only write down the cases where the final flip is heads. What is N?Question from one of... more

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Probability

12/10/21

The sample includes 30% of women and 70% of men. It is known that among them 10% of women and 60% of men smoke. Person X is known to be a non-smoker. Find the probability that X is male.

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Probability

12/09/21

4.A candy store has Snickers, Milky Way, Three Musketeers, Twix, and Rocky Road candy bars for sale. How many ways are there to select 16 candy bars to purchase?

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Probability

12/09/21

LSAT test scores are normally distributed with a mean of 152 and a standard deviation of 5. What score would place you in the top 2% of test-takers? (Round your answer to the nearest whole number.)

You may need to use the appropriate appendix table or technology to answer this question.LSAT test scores are normally distributed with a mean of 152 and a standard deviation of 5. What score would... more

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Probability

12/07/21

If A and B are events such that P(A)=1/2, P(B)=1/3 and P(AuB)=2/3. Find P(B'/A)

Anyone know probability, I'm really stuck on this one..... I need help

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Probability

12/07/21

What is the mean of the set {4,9,18,8,10}?

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Probability Statistics

12/05/21

Help me find the probability this man’s weight please

Noel, a 35 year old office worker, has been struggling with his weight for a long time. He is looking to start dating again, so earlier this year he decided to join a gym. A few days ago he noted... more

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Probability

12/05/21

Confused on how to approach this

have three errands to take care of in the Administration Building. Let Xi = the time that it takes for the ith errand (i = 1, 2, 3), and let X4 = the total time in minutes that I spend walking to... more

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Probability

12/04/21

A certain lottery has 36 numbers in how many different ways can four of the numbers be selected

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Probability

12/03/21

Probability confusion

A certain automobile manufacturer equips a particular model with either a six-cylinder engine or a four-cylinder engine. Suppose the fuel efficiencies (mpg) for six-cylinder and four-cylinder cars... more

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Probability of independent events: Decimal answers

Probability of independent events: Decimal answers

Probabilities of draws without replacement

Let n1 =100​, x1=60 ​, n2 =100​, and x2=80 . Complete part​ (b) below.

According to a recent​ report, 44% of college student internships are unpaid. A recent survey of 100 college interns at a local university found that 49 had unpaid internships.

In a​ one-tail hypothesis test where you reject only in the lower ​tail, what is the if zstat = +1.08

Probability Question

What is the probability that both of the people you interview are women?

Determine the probability of randomly selecting a green piece of clothing or a jacket.

If the height of students in one school follows a normal distribution with a mean of 160 cm and a standard deviation of 5 cm. What is the percentage of the students with a height of 155-165 cm?

Probability Practice Questions

Statistics question

A test was given to a group of students. The grades and major are summarized below. (New to this so full questions is uploaded to this screenshot) https://prnt.sc/22v7ooq

Joselyn and Tanya are on a swim team. The table below shows the probabilities of the team winning or losing when the team is playing away or is playing at home.

Expected number of becoming good friends

Assigning Probability

The sample includes 30% of women and 70% of men. It is known that among them 10% of women and 60% of men smoke. Person X is known to be a non-smoker. Find the probability that X is male.

4.A candy store has Snickers, Milky Way, Three Musketeers, Twix, and Rocky Road candy bars for sale. How many ways are there to select 16 candy bars to purchase?

LSAT test scores are normally distributed with a mean of 152 and a standard deviation of 5. What score would place you in the top 2% of test-takers? (Round your answer to the nearest whole number.)

If A and B are events such that P(A)=1/2, P(B)=1/3 and P(AuB)=2/3. Find P(B'/A)

What is the mean of the set {4,9,18,8,10}?

Help me find the probability this man’s weight please

Confused on how to approach this

A certain lottery has 36 numbers in how many different ways can four of the numbers be selected

Probability confusion

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Let n1 =100, x1=60 , n2 =100, and x2=80 . Complete part (b) below.

According to a recent report, 44% of college student internships are unpaid. A recent survey of 100 college interns at a local university found that 49 had unpaid internships.

In a one-tail hypothesis test where you reject only in the lower tail, what is the if zstat = +1.08