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Statistics

09/15/22

Hello, I need help solving the question below. Please help

Given a sample X1, … , X9 ~ 𝑁 (𝜇, 32), if 𝜇 = 1 , 𝑃 ( − 2 < 𝑋̅ < 4 ) = ?

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Statistics

09/15/22

Statistics questions

1A discrete random variable X models how many sales per day a salesman makes. From past experience we know PX(X ≤ 3) = 0.3 and PX(X ≥ 3) = 0.9. Which of the following must be true?PX(X < 4) <... more

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Statistics

09/15/22

business statistic

a) Three randomly selected households are surveyed as a pilot project for a larger survey to be conducted later. The numbers of people in the households are 5, 7, and 9. Consider... more

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Statistics

09/15/22

Multiple-choice questions each have 4 possible answers, one of which is correct. Assume that you guess the answers to 4 such questions.Use the multiplication rule to find the probability that the... more

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Statistics

09/15/22

Question about Standard Deviation

x P(x) 0 0.05 1 0.3 2 0.3 3 0.35 Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal places

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Statistics

09/14/22

business statistics

On a busy day, the average roller coaster wait time at a large amusement park is 27 minutes. Suppose the standard deviation of the wait time is 11.9 minutes and the distribution of wait... more

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Statistics

09/14/22

Hi I need help with the type error

1.62) Cooling method for gas turbines. During periods of high electricity demand, especially during the hot summer months, the power output from a gas turbine engine can drop dramatically. One way... more

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Statistics

09/14/22

Hello, I need help with the word problem

1.71) Laughter among deaf signers. The Journal of Deaf Studies and Deaf Education (Fall 2006) published an article on vocalized laughter among deaf users of American sign language (ASL). In... more

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Statistics

09/14/22

Statistics discrete probably

Tickets for a raffle cost $10. There were 657 tickets sold, One ticket will be randomly selected as thewinner, and that person wins $1200 and also the person is given back the cost of the ticket.... more

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Statistics Probability

09/12/22

probability and stats

Giving a test to a group of students, the grades and genders are summarized below. A B C Total Male 17 20 12 49 Female 2 3 15 20 Total 19 23 27 69 If one student is chosen at random,find... more

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Statistics

09/12/22

statistics questions studying for mid sems

1 Let X be normally distributed with mean 10. A statistician is trying to work out P(X > 16). They correctly work out that this probability is 0.04 (rounded to 2dp). Which of the following is... more

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Statistics

09/12/22

Let X ∼ N(0, 2) and Y ∼ N(0, 1), and let Cov(X, Y ) = −1. What is the distribution of 2X − 3Y ?

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Statistics

09/11/22

Stat question about CDs

With one method of a procedure called acceptance sampling, a sample of items is randomly selected without replacement and the entire batch is accepted if every item in the sample is okay. The ABCD... more

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Statistics

09/11/22

Statistics homework

Common stock distributed between $20 & $40 what is probability stock price will be more than $33

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Statistics

09/10/22

Stat question for MAth

Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 75 people in the 18-21 age bracket and finds that 64 of them respond and 11... more

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Statistics

09/10/22

Math question about stat

Suppose a jar contains 8 red marbles and 12 blue marbles. If you reach in the jar and pull out 2 marbles at random at the same time, find the probability that both are red.

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Statistics Math Computer Science Probability

09/10/22

Applied Probability & Information Theory - Joint Entropies

A child’s toy contains two windows in each of which a clown’s face appears when a button is pressed. The clown may be either smiling or crying. The design is such that the probability of each... more

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Statistics

09/10/22

Statistics math

Adult men have heights with a mean of 69. 0 inches and a standard deviation of 2.8 inches find the Z score of a man who is 60. 1 inches tall

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Statistics Computer Science Probability

09/10/22

Jensen’s Inequality & Strictly convex functions

Using the Jensen’s Inequality to show that f(x) = x 2 is strictly convex function.

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Statistics Probability

09/10/22

Probabilistic Independence

Explain what it is meant by two random variables X and Y are probabilistically independent.

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Statistics Math

09/10/22

A poker hand consisting of 4 cards is dealt from a standard deck of 52 cards. Find the probability that the hand contains exactly 3 face cards. Leave your answer as a reduced fraction.

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Statistics Math Probability

09/10/22

Lottery Probability Gains and Losses

The LotLot Lottery has a game called pick 4 numbers from 1 to 9, where player pays 50 pesos. If the 4 numbers come up in any order, then the player wins 6,300 pesos. Then the expected amount of... more

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Statistics

09/09/22

Discrete probability

7% of all Americans live in poverty. If 39 Americans are randomly selected, find the probability thata. Exactly 4 of them live in poverty. b. At most 1 of them live in poverty. c. At least 4 of... more

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Statistics

09/09/22

Discrete probability

The student council is hosting a drawing to raise money for scholarships. They are selling tickets for $9 each and will sell 900 tickets. There is one $2,000 grand prize, three $200 second prizes,... more

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Statistics

09/07/22

The following table presents the values of X and Y sets of observations:

X 12 15 16 17 14Y 110 124 134 139 124Use the information provided to compute Karl Pearson Correlation Coefficient and interpret the result.Compute the value of coefficient of determination and... more

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Hello, I need help solving the question below. Please help

Statistics questions

business statistic

Stat Question Number 13

Question about Standard Deviation

business statistics

Hi I need help with the type error

Hello, I need help with the word problem

Statistics discrete probably

probability and stats

statistics questions studying for mid sems

Let X ∼ N(0, 2) and Y ∼ N(0, 1), and let Cov(X, Y ) = −1. What is the distribution of 2X − 3Y ?

Stat question about CDs

Statistics homework

Stat question for MAth

Math question about stat

Applied Probability & Information Theory - Joint Entropies

Statistics math

Jensen’s Inequality & Strictly convex functions

Probabilistic Independence

A poker hand consisting of 4 cards is dealt from a standard deck of 52 cards. Find the probability that the hand contains exactly 3 face cards. Leave your answer as a reduced fraction.

Lottery Probability Gains and Losses

Discrete probability

Discrete probability

The following table presents the values of X and Y sets of observations:

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