8,971 Answered Questions for the topic statistics

Statistics Stats Shaded Regions

03/16/22

Non Standard Distributions, Central Limit Theorem
Find the area of the shaded region. The graph to the right depicts IQ scores of​ adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. 102 122 A... more
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Statistics

03/16/22

How do I start this off? I keep getting my answer incorrect.

From a group of 8 people, you randomly select 5 of them.What is the probability that they are the 5 oldest people in the group?
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Statistics

03/16/22

Hi I need help!
The number of chocolate chips in an​ 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. ​(a) What is the... more
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Statistics

03/16/22

The random variable x is the number of occurrences of an event over an..
The random variable x is the number of occurrences of an event over an interval of 10 minutes. It can be assumed the probability of an occurrence is the same in any two time periods of an equal... more
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Statistics

03/16/22

If A and B are mutually exclusive events...
If A and B are mutually exclusive events with P(A) = .5 and P(B) = .5, then P(A ∩ B) is .5, 1, 0 or .25
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Statistics

03/16/22

The total of 72 students took two courses. The table below shows the number of students in two courses according to their final grades.

A B C D F CALCULUS 10 7 8 5 6 STATISTICS 12 6 6 8 4A student is selected random. Find... more
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Statistics

03/16/22

Three people are selected at random. Find the probability that all three are born on Sunday.
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Statistics

03/16/22

Two dice are tossed. Find the probability that their sum is eleven.
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Statistics

03/16/22

Restaurant has two apppetizers, three main dishes, five drinks. If you would like to order all three, how many different meals can you order?
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Statistics Math Probability Maths

03/16/22

A random sample of size 50 is taken from a large population with mean μ=160 and standard deviation σ=18.

A random sample of size 50 is taken from a large population with mean μ=160 and standard deviation σ=18. What is the mean of the sampling distribution of the sample means? What is the standard... more
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Statistics

03/16/22

can you please help me
A bag contains 5 gold marbles, 7 silver marbles, and 29 black marbles. The rules of the game are as follows: You randomly select one marble from the bag. If it is gold, you win $4, if it is silver,... more
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Statistics

03/16/22

can you help me solve this
A poll is given, showing 35% are in favor of a new building project.If 9 people are chosen at random, what is the probability that at least 5 of them favor the new building project? Probability... more
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Statistics

03/16/22

can you help me solve this
Suppose that about 77% of graduating students attend their graduation. A group of 33 students is randomly chosen, and let X be the number of students who attended their graduation. What is the... more
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Statistics

03/16/22

can you help me solve this
A poll is given, showing 80% are in favor of a new building project.If 7 people are chosen at random, what is the probability that fewer than 5 of them favor the new building project? Probability... more
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Statistics

03/16/22

can you help me solve this
Assume Binomial Distribution with n = 10 and p = 0.6. Please show your answers to 4 decimal places.P(X == 4) =  P(X ≤≤ 4) =   P(X << 4) =   P(X >> 4) =   P(X ≥≥ 4) = 
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Statistics

03/16/22

can you please help me solve this
If a seed is planted, it has a 46% chance of growing into a healthy plant. Let X be the number of seeds grow into healthy plants when 62 seeds are planted. What is the distribution of X? X... more
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Statistics

03/16/22

I need help to answer this problem
A company prices its tornado insurance using the following assumptions:• In any calendar year, there can be at most one tornado. • In any calendar year, the probability of a tornado is 0.04. • The... more
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Statistics

03/15/22

Normal Distribution
A sample of size 36 is drawn from a population with mean 47 and standard deviation of 9. Find P (X ≤ 47.9)
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Statistics

03/15/22

If I add up all the marbles it equals to 23 marbles. What am I doing wrong ?

A bag contains 9 red marbles, 5 white marbles, and 9 blue marbles. You draw 4 marbles out at random, without replacement. Give all answers as a decimal rounded to four places.
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Statistics

03/15/22

How do you find P(z<-2.25)?
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Statistics Probability

03/15/22

A distribution of values is normal with a mean of 116.7 and a standard deviation of 73.3
Find P68, which is the score separating the bottom 68% from the top 32%.Find P68=_______________________Enter your answer as a number accurate to 1 decimal place. Answers obtained using... more
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Statistics Math Excel Mathematics

03/15/22

What are the Objective Function and Constraints for this problem?
A producer has three products, A, B, and C, which are composed from many of the same raw materials and subassemblies by the same skilled workforce. Each unit of product A uses 15 units of Raw... more
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Statistics

03/14/22

A certain flight arrives on time 81 % of the time. Suppose 148 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that….
A certain flight arrives on time 81 % of the time. Suppose 148 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that ​(a) exactly 108... more
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03/14/22

statistical comparisons of frog jumps using morphometric measurements vs jump length
Is there a useful formula for using length and width measurements from frogs combined with their mass to obtain a single numerical value to use for statistical analysis against jump length? I was... more
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Statistics

03/14/22

A food distribution company has employees that order food supplies for local restaurants by predicting sales.
A food distribution company has employees that order food supplies for local restaurants by predicting sales. The company pulls an SRS of 500 orders and finds that 408 orders were correct.... more
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