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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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Statistics

07/04/22

According to a recent survey, 10% of the population is left handed. If you randomly select 4 people what is the probability that at least one of them is left handed?

Probability - statistics

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Statistics

07/04/22

Z score with sample size problem

A pizza restaurant’s order processing time is normally distributed. A random sample has mean 30 minutes and standard deviation five minutes.If the pizza restaurant promises their customers... more

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Statistics Math Elementary Math

07/04/22

Statistics normal dispution probality z table

Problem 4. What is the probability that the shopper will be in the supermarket between 31 and 58 minutes? Mean 43 minutes Standard deviation 12 minHint: Convert the normal distribution X to... more

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Statistics Probability

07/03/22

Uniform Distribution

The lengths of a professor's classes has a continuous uniform distribution between 50.0 min and 52.0 min. If one such class is randomly selected, find the probability that the class length is... more

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Statistics Math Elementary Math

07/03/22

Hint: Convert the normal distribution X to Standard normal using Z formula Z=(X-μ)/σZ-values from the table and then find the probability.

A survey indicates that for each trip to a supermarket, a shopper spends an average of 43 minutes with a standard deviation of 12 minutes in the store. The lengths of time spent in the store are... more

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Statistics Algebra 2

07/03/22

Probability question

If Sally is given 6 exam prompts to study and 4 of the 6 will appear on the exam, is it true that she will only need to study for 3 prompts for one to be on the exam?

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Statistics

07/02/22

Continuous Uniform Distribution Question

The lengths of a professor's classes has a continuous uniform distribution between 50.0 min and 52.0 min. If one such class is randomly selected, find the probability that the class length is... more

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Statistics

07/01/22

What is the probability that if an individual man is randomly selected, his hip breadth will be greater than 16.9 in?

Suppose that an airline uses a seat width of 16.9 in. Assume men have hip breadths that are normally distributed with a mean of 14.5 in. and a standard deviation of 1 in. Complete parts (a)... more

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Statistics

07/01/22

What is the probability the elevator is overloaded?

An elevator has a placard stating that the maximum capacity is 2016 lb- 12 passengers. So, 12 adult male passengers can have a mean weight of up to 2016/12=168 pounds If the elevator is loaded... more

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Statistics

07/01/22

Comparing nominal and ordinal variables .

Hi,I am conduction a prospective study, in which I follow up patients using a questionnaire, and I repeat the same questionnaire in different stages of the follow up. The collected data from the... more

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Statistics

07/01/22

Probability question Fair die

A fair die is rolled four times. What is the probability that it comes up 5 at least once? Write your answer as a fraction or a decimal, rounded to four decimal places.

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Statistics

06/30/22

1) A statistics professor at a large university had an assignment where his students would sample from the population of all the students at the college living on campus....

1) A statistics professor at a large university had an assignment where his students would sample from the population of all the students at the college living on campus. Each of his 400 students... more

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Statistics Algebra 2

06/30/22

Create an explicit exponential equation to model the change in quantity of pesticide present in the soil over time.

The amount of a particular pesticide in soil decreases by 1.15% per day after application. A homeowner applies 68 grams of the pesticide to a square yard section of lawn. Create an explicit... more

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Statistics

06/30/22

What is the critical value?

What is the critical value for z0.05

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Statistics

06/30/22

What are the bone density scores?

Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find the bone... more

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Statistics

06/30/22

What are the cutoff values?

Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard deviation of 1.00°C. Assume 3.2% of the thermometers are rejected because they have readings... more

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Statistics Probability

06/30/22

Suppose that x is a normal random variable with u=5 and o=2. What is the probability that the absolute value of x is at least 8.74?

µ=5σ= 2

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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

According to a recent survey, 10% of the population is left handed. If you randomly select 4 people what is the probability that at least one of them is left handed?

Z score with sample size problem

Statistics normal dispution probality z table

Uniform Distribution

Hint: Convert the normal distribution X to Standard normal using Z formula Z=(X-μ)/σZ-values from the table and then find the probability.

Probability question

Continuous Uniform Distribution Question

What is the probability that if an individual man is randomly selected, his hip breadth will be greater than 16.9 in?

What is the probability the elevator is overloaded?

Comparing nominal and ordinal variables .

Probability question Fair die

1) A statistics professor at a large university had an assignment where his students would sample from the population of all the students at the college living on campus....

Create an explicit exponential equation to model the change in quantity of pesticide present in the soil over time.

What is the critical value?

What are the bone density scores?

What are the cutoff values?

Suppose that x is a normal random variable with u=5 and o=2. What is the probability that the absolute value of x is at least 8.74?

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