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Statistics

02/09/22

Elementary statistics

Suppose a 6-sided die is weighted so that the probability of an outcome is proportional to the outcome. That is, P p P p P p P p P p P p (1 2 2 3 3 4 4 5 5 6 6 ) = = = = = = ( ) ( ) ( ) ( ) ( )... more

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Statistics

02/08/22

Ms. Tina Stevens just purchased a new dress that cost $120. What is the probability that she paid cash?

The credit department of Lion’s Department Store in Anaheim, California, reported that 28% of their sales are cash, 24% are paid with a credit card, and 48% with a debit card. Twenty percent of the... more

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Statistics

02/08/22

Statistics help

A bag contains 9 yellow marbles, 4 red marbles, and 5 white marbles. If two different marbles are drawn from the bag, what is the probability of drawing first a yellow marble and then a white marble?

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Statistics

02/08/22

Statistics help

A bag contains 5 black marbles, 9 white marbles, and 4 red marbles. If a marble is drawn from the bag, replaced, and another marble is drawn, what is the probability of drawing first a black marble... more

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Statistics Discrete Math Probability Maths

02/08/22

DISCRETE MATHS HELP NEEDED !!

On the menu of a Chinese restaurant, there are 7 chicken dishes, 5 beef dishes, 4 seafood dishes, and 10 vegetable dishes.In how many ways can they order if at most one dish of each kind is chosen?

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Statistics Math Discrete Math Probability

02/08/22

HELP NEEDED !!! DISCRETE MATHS

In the game of poker, a player receives a subset of 5 cards, called a poker hand, from the standard deck of 52 cards. The order in which the cards are received is not important, just the actual... more

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Statistics Math Discrete Math

02/08/22

Discrete Maths Help ASAP

In a standard deck of cards, there are 4 suits: clubs, diamonds, hearts, and spades. Each suit contains 13 cards: 2, 3,…,10, Jack, Queen, King, Ace. So there are 4 * 13=52 cards in the deck.A... more

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Statistics

02/08/22

Roy and Jennie are looking for a company to help plan their wedding.

Company A charges an amount based on the cost function, C=Vn + F, where C is total cost, V is variable cost, F is fixed cost, and n is the number of people who attend the wedding. Suppose n is a... more

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Statistics

02/08/22

Roy and Jennie are looking for a company to help plan their wedding.

Company A charges an amount based on the cost function, C=Vn + F, where C is total cost, V is variable cost, F is fixed cost, and n is the number of people who attend the wedding. Suppose n is a... more

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Statistics

02/08/22

A manufacturer produces items with a rectangular base. Let random variables denote the respective length(x) and width(y) of the rectangle (in cm).

Suppose x and y are independent with the following parameter values.E(x)= 2, Var(x)= 0.12, E(y)= 7, Var(y)= 0.34The perimeter is 2x + 2y. (Round to 4 decimal places if needed)a) What is the mean of... more

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Statistics

02/08/22

A lottery has a grand prize jackpot worth 80 million dollars. The chance of winning from purchasing a single ticket is 1 in 18900000.

a) What is the expected value of winning from a single ticket in dollars? (Round your answer to the nearest cent)b)Would it be worth to buy a ticket for 1 dollar? Yes/No

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Statistics

02/08/22

A survey was conducted from a large group of high school students in an effort to determine what science courses they were currently enrolled in. 68% in Chemistry, 65% in Physics, 47% in Biology.

Assume independence between the science classes that each student is enrolled in.(Round to 3 decimal places, if needed)a) What is the probability that a randomly selected student is enrolled in... more

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Statistics

02/08/22

One evening at a local restaurant, a manager decided to ask his patrons which meals they had cooked for themselves during the day, as opposed to eating out at a restaurant.

The manager found that 30% cooked breakfast, 20% cooked lunch, and 7% cooked both meals. (Round to 2 decimal places, if needed)a) What is the probability that a randomly selected patron cooked... more

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Statistics

02/08/22

A survey of 221 people in an introductory math course at the University of Alberta found that 173 people were under the age of 20, and 25 people were over the age of 30.

(Round all answers to 3 decimal places, if needed)a) What is the probability that a randomly selected person is either above the age of 30 or under the age of 20?b) What is the probability that a... more

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Statistics

02/08/22

Suppose that arrival times for an elevator in a large hotel are bell-shaped with a mean of 20 seconds and a standard deviation of 6 seconds.

What percent of time will the elevator arrive between 2 seconds and 8 seconds?

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Statistics

02/08/22

Suppose that last month, WestJet flights arrived on time 77% of the time and you were on 3 of those flights. (Round to 4 decimal places if needed)

a) Given that each flight is independent of one another, what is the probability that all of your flights arrived on time?b) What is the probability that none of your flights arrived on time?c)... more

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Statistics

02/07/22

IQ scores have an approximately bell-shaped distribution with mean 100 and standard deviation 15. Use the Empirical Rule to answer the following questions.

What percentage of IQ scores are above 130?What percentage of IQ scores are below 115?What percentage of IQ scores are between 70 and 85?

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Statistics

02/07/22

Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the height of a man with a z-score of 2.1071 (to 4 decimal places)

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Statistics

02/06/22

Statistics Questions

The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 119 and standard deviation of 16 .Someone qualifies as having Stage 2 high blood pressure if their... more

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Statistics Biostatistics

02/06/22

A random sample of 390 married couples found that 290 had two or more personality preferences in common.

A random sample of 390 married couples found that 290 had two or more personality preferences in common. In another random sample of 558 married couples, it was found that only 38 had no... more

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Statistics Biostatistics

02/06/22

Independent random samples of professional football and basketball players gave the following information. Assume that the weight distributions are mound-shaped and symmetric.

Weights (in lb) of pro football players: x1; n1 = 21 245 263 255 251 244 276 240 265 257 252 282 256 250 264 270 275 245 275 253 265 272 Weights (in lb) of pro basketball players: x2; n2 =... more

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Statistics Biostatistics

02/06/22

In a random sample of 530 judges, it was found that 287 were introverts.

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.In a random sample of 530 judges, it was found that 287 were... more

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Statistics Biostatistics

02/06/22

Statistics Question

The method of tree ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal... more

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Statistics

02/06/22

i dont get this

how to compute P(-1.22<t<1.22) with 14 degrees of freedom

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Statistics Probability

02/06/22

probability and statistics

1. Read the given data ‘TIPS.csv’ as a dataframe named Tips and answer the following question.a) In the tips dataframe, for the variable “total bill” what is the 3rd quartile and... more

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Elementary statistics

Ms. Tina Stevens just purchased a new dress that cost $120. What is the probability that she paid cash?

Statistics help

Statistics help

DISCRETE MATHS HELP NEEDED !!

HELP NEEDED !!! DISCRETE MATHS

Discrete Maths Help ASAP

Roy and Jennie are looking for a company to help plan their wedding.

Roy and Jennie are looking for a company to help plan their wedding.

A manufacturer produces items with a rectangular base. Let random variables denote the respective length(x) and width(y) of the rectangle (in cm).

A lottery has a grand prize jackpot worth 80 million dollars. The chance of winning from purchasing a single ticket is 1 in 18900000.

A survey was conducted from a large group of high school students in an effort to determine what science courses they were currently enrolled in. 68% in Chemistry, 65% in Physics, 47% in Biology.

One evening at a local restaurant, a manager decided to ask his patrons which meals they had cooked for themselves during the day, as opposed to eating out at a restaurant.

A survey of 221 people in an introductory math course at the University of Alberta found that 173 people were under the age of 20, and 25 people were over the age of 30.

Suppose that arrival times for an elevator in a large hotel are bell-shaped with a mean of 20 seconds and a standard deviation of 6 seconds.

Suppose that last month, WestJet flights arrived on time 77% of the time and you were on 3 of those flights. (Round to 4 decimal places if needed)

IQ scores have an approximately bell-shaped distribution with mean 100 and standard deviation 15. Use the Empirical Rule to answer the following questions.

Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the height of a man with a z-score of 2.1071 (to 4 decimal places)

Statistics Questions

A random sample of 390 married couples found that 290 had two or more personality preferences in common.

Independent random samples of professional football and basketball players gave the following information. Assume that the weight distributions are mound-shaped and symmetric.

In a random sample of 530 judges, it was found that 287 were introverts.

Statistics Question

i dont get this

probability and statistics

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