803 Answered Questions for the topic Probability & Statistics

Probability & Statistics

05/26/17

Probablity
A science class has 7 girls and 5 boys in the seventh grade and 4 girls and 4 boys in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a... more
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Probability & Statistics

05/25/17

What are the odds of this occurring?
There are numbers from 1 to 2500. There are 625,000 people. What are the chances that 3 people pick the same 4 numbers?The order does not matter and the people cannot repeat.
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Probability & Statistics

05/24/17

Find the z-score that corresponds to the 30th percentile.
How to you find this answer using a ti-84 calculator.
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Probability & Statistics Normal Distribution

05/23/17

If a normal distribution has a mean of 65 and Standard deviation of 8. What score bounds the 19.8% below the mean?
I know how to solve the normal distribution in terms ofBelowBetween Two numbersAnd above the numberBut i don't know how to solve this with this kind of question.
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Probability & Statistics

05/22/17

Suppose there are 1000 first-year students at a certain university.
Two hundred are taking French but not statistics, one hundred are taking statistics but not French, and another 50 are taking both French and statistics. If you pick a student at random, find the... more
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Probability & Statistics

05/22/17

Brett makes a putt about 65% of the time. What is the probabilty that brett's first m9iss will be on his 5th putt?
Brett makes a putt about 65% of the time. What is the probabilty that brett's first miss will be on his 5th putt?  
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Probability & Statistics

05/12/17

a random sample of n=9 scores is obtained from a normal population with μ=40 and σ=18. what is the probability that the sample mean will be greater than M=43?
a random sample of n=9 scores is obtained from a normal population with μ=40 and σ=18. what is the probability that the sample mean will be greater than M=43?  
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Probability & Statistics

05/08/17

If a sample consists of the following data values, what is the sample mean?
13, 91, 44, 68, 54, 16, 88, 74
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Probability & Statistics

05/08/17

Five people buy individual insurance policies
Five people buy individual insurance policies. According to the research, the probability of each of these poeple not filing a claim for at least 5 years is 2/3. The probability that all 5 have not... more
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Probability & Statistics

05/04/17

Jessica has 6 red t-shirts and 9 yellow t-shirts. If she picks one t-shirt at random, what is the probability that it will not be yellow?
probability 
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Probability & Statistics

05/03/17

The relationship between heavy alcohol use and family violence is +0.075.
The relationship between heavy alcohol use and family violence is +0.075. This shows:a. There is an inverse relationshipb. There is a strong relationship between alcohol use and family violencec.... more
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Probability & Statistics

05/03/17

There was a strong negative relationship between X and Y. What does this mean?
There was a strong negative relationship between X and Y. What does this mean?
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Probability & Statistics

05/03/17

If you flip a coin three times, what is the probability (represented in percent) of getting three heads?
If you flip a coin three times, what is the probability (represented in percent) of getting three heads?
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Probability & Statistics

05/03/17

What is the probability (represented in percent) of selecting a Queen from the deck of cards after a person has already selected a Queen and did not put it back
What is the probability (represented in percent) of selecting a Queen from the deck of cards after a person has already selected a Queen and did not put it back in the deck?
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Probability & Statistics

05/03/17

You toss two dice simultaneously. What is the approximate probability (represented in percent) that you will obtain two 6’s on a single toss?
You toss two dice simultaneously. What is the approximate probability (represented in percent) that you will obtain two 6’s on a single toss?
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Probability & Statistics

05/03/17

3. Consider an experiment that involves rolling a fair six-sided twice.
Let X denote the number rolled on the first roll and let Y denote the number on the second. Let A denote the event that the sum of the two numbers rolled is less than or equal to 4. Let B denote... more
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Probability & Statistics

04/29/17

if there is a war in every 10 year then what is the probability that there will be no war in 25 year?
THIS QUESTION IS FROM PROBABILITY.PLEASE SOLVE AND REPLY.
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Probability & Statistics

04/24/17

Statistics
Many people coming into the bakery order sandwiches with 3 condiments. How many different sandwiches with 3 condiments (and 1 type of meat, 1 type of cheese) could be created?
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Probability & Statistics Probability Probability Problems

04/23/17

Three people independently each think of an integer in the set {1,2,3,4,5,6,7}.
Please help I have no idea how to do this question.     Three people independently each think of an integer in the set {1,2,3,4,5,6,7}. Find, in fractional form, the probability that the sum of... more
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Probability & Statistics

04/21/17

The equation of a regression line is ŷ = 3.5x + 4.6. Determine the y - intercept of this line. Type a numerical answer in the provided space. Do not type spaces
Im not sure what you do with this question
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Probability & Statistics Statistics Question

04/21/17

The equation of a best fit line is y = 6x + 9. Predict a value for y when x = 4.
I don't understand how you do this math problem. 
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Probability & Statistics Math Math Word Problem Math Help For College

04/20/17

Let c be the total charge​ (in dollars) for t hours of tutoring. Are t and c linearly​ related?
A math tutor charges $2020 per hour. Let c be the total charge (in dollars) for t hours of tutoring. Are t and c linearly related? If so, find the slope and describe what it means in this... more
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04/19/17

Probability
A computer is programmed to produce at random a single digit from the list 0,1,2,3,4,5,6,7,8,9. The program runs twenty times. Let Y be the number of zeros that occur. a) State the distribution... more
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Probability & Statistics

04/17/17

please help!
The manager of a video game store found that 35 of the 140 people who preordered the latest baseball game canceled their orders the day before the game was released. He used that data to create a... more
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Probability & Statistics

04/17/17

please help!
April and Sanjay are both using tools to simulate the probability that a family with three children will have exactly one girl. April is using a coin, with tails up representing a boy and heads up... more
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