5,385 Answered Questions for the topic probability

Probability Statistics

12/20/21

If X=70​, S=12​, and n=16​, and assuming that the population is normally​ distributed, construct a 90% confidence interval estimate of the population​ mean, μ. please round to two decimal places.
If X=70​, S=12​, and n=16​, and assuming that the population is normally​ distributed, construct a 90% confidence interval estimate of the population​ mean, μ. please round to two decimal places.
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Probability Statistics

12/20/21

stats hw final practice 10
Assume there is a sample of n1=4​, with the sample mean X1=37 and a sample standard deviation of S1=2​, and there is an independent sample of n2=5 from another population with a sample mean of... more
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Probability Statistics

12/20/21

If X=70​, S=12​, and n=16​, and assuming that the population is normally​ distributed, construct a 90% confidence interval estimate of the population​ mean, μ.
If X=70​, S=12​, and n=16​, and assuming that the population is normally​ distributed, construct a 90% confidence interval estimate of the population​ mean, μ. please round to two decimal places.
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Probability Statistics

12/20/21

b. Determine the​ p-value and interpret its meaning. The​ p-value is

A manufacturer of chocolate candies uses machines to package candies as they move along a filling line. Although the packages are labeled as 8​ ounces, the company wants the packages to contain a... more
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Probability Statistics

12/20/21

hw 8 question 10, please answer part a and b
A cellphone provider has the business objective of wanting to determine the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at a... more
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Probability

12/18/21

Probability of independent events: Decimal answers
Of the people who fished at Clearwater Park today, 48 had a fishing license, and 12 did not. Of the people who fished at Mountain View Park today, 49 had a license, and 21 did not. (No one fished... more
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Probability

12/18/21

Probabilities of draws without replacement
A box contains 5 red balls and 7 orange balls. If Tim chooses 6 balls at random from the box, what is the probability that he will select 4 red balls and 2 orange balls? Round your answer... more
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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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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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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.
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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