06/26/19

Guessing the length of a playlist on "shuffle random?"?
The other night I was hanging out with some friends and someone put on a playlist on shuffle random, where the songs are drawn uniformly at random from a fixed playlist. The person who put the... more
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06/20/19

statistics with normal variables
Given that x is a normal variable with mean μ = 42 and standard deviation σ = 6.3, find the following probabilities. (Round your answers to four decimal... more
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06/17/19

Sin15degrees prove this by compound angles.
sin15
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06/16/19

What is the probability that both captains will be eighth graders?
Mrs. Donovan is the coach of a middle school golf team that has 10 golfers. There are 4 sixth graders, 2 seventh graders, and 4 eighth graders on the team. Mrs. Donovan will randomly select two... more
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06/11/19

Random Variable Probability Russian Roulette?
I am very confused on this one. Any help in how to solve it and what probability rule to use would be appreciated. Consider the situation in which a person played Russian roulette (one bullet,... more
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05/21/19

Statistics and uniform distribution
While conducting experiments a marine biologist select water ducks from a uniformly distributed collection that Barry between 2.00 and 7.00 meters what is the probability that a randomly-selected... more
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05/13/19

Statistics Help
A standard six-sided dice is repeatedly rolled until it lands on a two. What is the probability that the first two is rolled after the first six rolls?
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05/13/19

Statistics Help

A company manufactures televisions in batches of 25 and there is a 1% rate of defects. Find the standard deviation for the number of defects per batch.
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05/11/19

A point M is randomly selected from a segment AB whose length is 9. What is the probability that the longest segment between AM and MB has the length no more then 6?
A point M is randomly selected from a segment AB whose length is 9. What is the probability that the longest segment between AM and MB has the length no more then 6?
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05/06/19

Math Help Stats, NEED TODAY PLEASE 5.6 !! Question 12

The placement test for a college has scores that are normally distributed with a mean of 450 and a standard deviation of 100. If the college accepts only the top 7% of​ examinees, what is the... more
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05/03/19

Can we create a triangle with sides of 2:3:5?
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05/03/19

What is the area of a square whose length of the diagonal is 6√2?
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04/30/19

prove statistic about MLE
max IxiI = (-x(1), x(n)) prove it this is the result for MLE for U(-theta, theta) by tow method and i need to prove
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04/28/19

I need help...please and thank you very much
Assume that the significance level is alpha equals α=. 0.01Use the given information to find the​ P-value and the critical​ value(s).The test statistic of z =1.40 is obtained when testing the claim... more
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04/27/19

statistics - math
Assume that when adults with smartphones are randomly​ selected, 56​% use them in meetings or classes. If 11adult smartphone users are randomly​ selected, find the probability that fewer than 55of... more
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04/27/19

Statistics - math
Assume that when adults with smartphones are randomly​ selected, 56​% use them in meetings or classes. If 11 adult smartphone users are randomly​ selected, find the probability that fewer than 5of... more
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04/26/19

Use the Empirircal Rule to answer this question
Women in a survey spend an average of $246 per year on beauty supplies. If the distribution of women's spending is normally distributed and the standard deviation is $30. What percent spend less... more
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04/26/19

Statistics probability
A peculiar die has the following properties: on any roll the probability of rolling either a 1, a 5, or a 4 is 1/2, just as it is with an ordinary die. Moreover, the probability of rolling either... more
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02/27/19

Simplify the following equation and then graph y=cosxcos2x -sinxsin2x

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09/19/18

Finding Cov(4X,4X+2Y)
Let X and Y be stochastic variables. Assume Var(X)=1.74 and Cov(X,Y)=0.79 What is Cov(4X,4X+2Y).  Have tried to use the formulas for Var and Cov to get around this problem, but haven't managed to... more
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06/11/18

help! (please) i need to understand this for finals! thanks in advance!
a 2 foot tall tree is planted and then grows at a rate of 3 feet per year for 40 years. find a linear function that models the growth of this tree. sketch its graph. interpret its slope and... more
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03/02/18

if you have the numbers 1,1,2,3,4,6,8, how many odd numbers over 5,000,000 can you make?
Stats question, i thought it was 120 because there would only be 2 ways to make an odd number but some people told me that since there are 2 ones then it would be x3 at the end to make 180. i think... more
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11/20/17

Before and After" Matched Pair Hypothesis Test
Give an example of a "Before and After" Matched Pair that you, as a Health Professional, would like to do a Hypothesis Test for. Your discussion MUST include what is being measured as the “Before”... more
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11/18/17

Question Below. Emergency! My Assignment is Due by 3pm
A jury has 12 jurors. A vote of at least 10 of 12 for "guilty" is necessary for a defendant to be convicted of a crime. Assume that each juror acts independently of the others and that the... more
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11/10/17

Question: A community center is going on a trip to Philadelphia via several buses. The ratio of men to women to children is 1:2:3. If there are 150 people
i don't know this
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