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Statistics

07/11/22

A spinner has equal regions numbered 1 through 21. What is the probability that the spinner will stop on an even number or a multiple of 3?

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07/10/22

Probability of certain cards in 10 card poker

Find the probability of being dealt seven clubs and three cards with one card of each other remaining suit in 10-card poker.

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Statistics Math Probability

07/10/22

What is the probability of these two scenarios?

A shipment of 13 microwave ovens contains 3 defective units. A restaurant buys three of these units. What is the probability of the restaurant buying at least two nondefective units?The... more

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Statistics Math

07/10/22

Normal Distribution Question:

The heights of adult males are normally distributed with the following parametersMean: 70 inchesStandard Deviation: 3 inchesTask 1: The average NBA player is 6'7", or 79 inches tall. What is the... more

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Statistics

07/10/22

What is the confidence interval estimate of the population mean μ?

A food safety guideline is that the mercury in fish should be below 1 part per million (ppm). Listed below are the amounts of mercury (ppm) found in tuna sushi sampled at different stores in a... more

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Statistics

07/10/22

statistics math question

A food safety guideline is that the mercury in fish should be below 1 part per million (ppm). Listed below are the amounts of mercury (ppm) found in tuna sushi sampled at different stores in a... more

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Statistics

07/10/22

Statistics - Method of Moments Estimators

A random sample of n observations, 𝑌_1,𝑌_2,…,𝑌_𝑛 is selected from a population in which 𝑌_𝑖, 𝑖=1,2,…𝑛, possesses a gamma probability density function with parameters 𝛼 and 𝛽. How many parameters ?... more

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Statistics Probability Data Science

07/10/22

How to calculate the likelihood?

We will define the following probabilities for a PCR test:p - The probability that a pcr test of a **sick** person, will show us a positive result.q - The probability that a pcr test of a... more

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Statistics

07/09/22

Questions A, B and C

The taxi and takeoff time for commercial jets is a random variable x with a mean of 8.2 minutes and a standard deviation of 3.5minutes. Assume that the distribution of taxi and takeoff times is... more

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Statistics

07/09/22

a) escape dune move a distance of more than 90 feet in 8 yrs. B) escape dune move a distance of less than 80 feet in 8 yrs. C) escape dune will move a total distance of between 80 and 90 feet in 8 yrs

It's true — sand dunes in Colorado rival sand dunes of the Great Sahara Desert! The highest dunes at Great Sand Dunes National Monument can exceed the highest dunes in the Great Sahara, extending... more

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Statistics Math Probability

07/09/22

What is the probability of tossing head and then rolling a number greater than two

A coin is tossed in a six sided dice number one through six is rolled. Find the probability of tossing ahead and then rolling a number greater than two. The probability of tossing ahead and then... more

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Statistics

07/08/22

Sketch the region corresponding to the statement P(z > c) = .45

The arrows can only be dragged to z scores that are accurate to 1 place after the decimal point (these values correspond to the tick marks on the horizontal axis). So round all z scores to 1... more

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Statistics

07/08/22

What is the approximate percentage of students who scored between 46 and 70 on the test? Round to two decimal places.

The maximum possible score on the test was 110, while the mean score was 70 and the standard deviation was 8.Is the answer 0.5?

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Statistics

07/08/22

Find the Expected value

A fundraising raffle where they sold 3994 tickets for 5$ each. There was one first-place prize worth 852$ and 5 second place prizes each worth 20$. What is the Expected value?

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Statistics

07/08/22

What is the probability of winning?

Supposed a certain game is fair and costs 9$ if you lose and the net payoff of 4$ if you win. The only possible outcomes of the game are winning and losing. Is the answer 0.55?

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Statistics

07/07/22

Need help finding the critical value

Find the critical value z of 83%. Round to two decimal places. I get it all divided out but when it comes to finding the critical value I have no idea how to find that number.

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Statistics

07/06/22

Measures of Center and Spread

For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 25 students, and the distribution of total study hours per week is... more

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Statistics

07/06/22

Probability - Statistics

Company XYZ has 108 employees. 31 of the employees are vegetarian, 27 of the employees own a Nissan Leaf and 15 of the employees are vegetarian and own a Nissan Leaf. If you randomly select an... more

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Statistics

07/06/22

Suppose a linear regression analysis produced the following equation relating a basketball player's total points scored to the number of minutes played in a season.

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Statistics Probability

07/06/22

This problem outlines a proof of the following equalities?

if ˆX = aX + b and ˆY = cY + d, then a) pˆX,ˆY = pX,Y and b) Cov[ˆX,ˆY] = acCov[X,Y](a) Show that ˆX −E[ ˆX] = a(X −E [X]), ˆY −E[ ˆY ] = c(Y −E [Y ]). (b) Use part (a) to show that Cov [ ˆX, ˆY ]... more

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Statistics

07/05/22

GPA Is Approximately Normally Distributed For All Students That Have Been Accepted To UCLA. The Average Gpa Is 4.0 With Standard Deviation Of .2. What Percent Had A Gpa Above 4.1

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Statistics

07/05/22

Statistics and Central Limit Theorem

The amount of pollutants that are found in waterways near large cities is normally distributed with mean 8.8 ppm and standard deviation 1.6 ppm. 37 randomly selected large cities are studied. Round... more

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Statistics

07/05/22

Suppose Batman rolls a die 6 times. How many different outcomes are possible (Sample Space)?

probability - statistics

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Statistics

07/05/22

Suppose that Nacho takes a multiple choice test. The test has 4 questions. Each question has 2 choices. What is the probability that Nacho will get all 4 questions wrong?

Probability - statistics

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Statistics

07/04/22

Central Limit Theorem and The Law of Large Numbers

Explain the Central Limit Theorem and the Law of Large Numbers. There are 3 key points. Include the formula for the standard error.

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A spinner has equal regions numbered 1 through 21. What is the probability that the spinner will stop on an even number or a multiple of 3?

Probability of certain cards in 10 card poker

What is the probability of these two scenarios?

Normal Distribution Question:

What is the confidence interval estimate of the population mean μ?

statistics math question

Statistics - Method of Moments Estimators

How to calculate the likelihood?

Questions A, B and C

a) escape dune move a distance of more than 90 feet in 8 yrs. B) escape dune move a distance of less than 80 feet in 8 yrs. C) escape dune will move a total distance of between 80 and 90 feet in 8 yrs

What is the probability of tossing head and then rolling a number greater than two

Sketch the region corresponding to the statement P(z > c) = .45

What is the approximate percentage of students who scored between 46 and 70 on the test? Round to two decimal places.

Find the Expected value

What is the probability of winning?

Need help finding the critical value

Measures of Center and Spread

Probability - Statistics

Suppose a linear regression analysis produced the following equation relating a basketball player's total points scored to the number of minutes played in a season.

This problem outlines a proof of the following equalities?

GPA Is Approximately Normally Distributed For All Students That Have Been Accepted To UCLA. The Average Gpa Is 4.0 With Standard Deviation Of .2. What Percent Had A Gpa Above 4.1

Statistics and Central Limit Theorem

Suppose Batman rolls a die 6 times. How many different outcomes are possible (Sample Space)?

Suppose that Nacho takes a multiple choice test. The test has 4 questions. Each question has 2 choices. What is the probability that Nacho will get all 4 questions wrong?

Central Limit Theorem and The Law of Large Numbers

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