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Statistics

03/18/22

Help with statistics problem

Problem : ∑4i=2 (x2+3)I don't understand why the solution is:(22+3) + (72+3) + (12+3)I don't understand how we get 72 followed by 12. Thanks for your help!!

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Statistics Math Probability Maths

03/17/22

You are apart-time crew at a fast food chain. Suppose you serve a certain number of customers every hour.

You are apart-time crew at a fast food chain. Suppose you serve a certain number of customers every hour. Assume the number of people you have served in 3 hours and let this be your population... more

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Statistics

03/17/22

Based on a sample of 100 people, 63% owned cats. What is the p-value?

If you can show how this would be done on a graphing calculator, such as a TI-84, that would be wonderful.

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Statistics

03/17/22

If one of the pedestrian deaths is randomly selected, find the probability that the driver was not intoxicated. (Please enter a decimal, and round your answer to 4 decimal places.)

Driver Intoxicated? Pedestrian Intoxicated? Yes Yes 41 72 No 215 647 The Blank Is No

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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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Help with statistics problem

You are apart-time crew at a fast food chain. Suppose you serve a certain number of customers every hour.

Based on a sample of 100 people, 63% owned cats. What is the p-value?

If one of the pedestrian deaths is randomly selected, find the probability that the driver was not intoxicated. (Please enter a decimal, and round your answer to 4 decimal places.)

Non Standard Distributions, Central Limit Theorem

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

Hi I need help!

The random variable x is the number of occurrences of an event over an..

If A and B are mutually exclusive events...

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

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

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

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

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

can you please help me

can you help me solve this

can you help me solve this

can you help me solve this

can you help me solve this

can you please help me solve this

I need help to answer this problem

Normal Distribution

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

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

A distribution of values is normal with a mean of 116.7 and a standard deviation of 73.3

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