8,918 Answered Questions for the topic statistics

Statistics Writing

02/10/24

Total Sampling Size for Stratified Sampling
Hi!I have an undergraduate mixed-method thesis and my sampling technique is disproportionate stratified sampling technique. My strata are students and faculty members. The population of students is... more
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Statistics

02/09/24

Could Someone Please Help Me Answer This Statistics Problem?
The Question: For this assignment, you will create and use a probability distribution that reflects rolling a pair of dice. First, construct a probability distribution for rolling 5's, displaying... more
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Statistics

02/09/24

Could Someone Please Help Me Solve This Statistics Problem?

The Question: For this assignment, you will create and use a probability distribution that reflects rolling a pair of dice. First, construct a probability distribution for rolling 5's, displaying... more
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Statistics

02/09/24

Help with answer statistics
From 1975 through 2020 the main annual gain of the Dow Jones industrial average was 652 a random sample of 35 years is selected from this population. What is the probability that the main gain for... more
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Statistics

02/07/24

What is the probability that her Internet service is not broken for four days in a row?
Ashley’s Internet service is terribly unreliable. In fact, on any given day, there is an 80%80% chance that her Internet connection will be lost at some point that day. What is the probability that... more
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Statistics

02/06/24

What proportion of pregnancies last beyond 223 days?  P(X > 223 days) = 
The lengths of pregnancies in a small rural village are normally distributed with a mean of 266 days and a standard deviation of 15 days. A distribution of values is normal with a mean of 266 and a... more
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Statistics

02/06/24

For a standard normal distribution, find: P(-0.72 < z < 0.38)
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Statistics

02/06/24

For a standard normal distribution, find if P(z < c) = 0.5646

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02/06/24

Statistics on a number line
There is a line with 48 equidistant points (like a number line). Four points are labeled:A=0, B=6, C=21, D=30, E=48If a point is placed at random on AE, find each probability as a fraction.1) P(on... more
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02/06/24

Probability for wait times

A shuttle bus arrives at a hotel every 40 minutes to take a guest into town. If a guest walks out the door at a random time, find the probability of each waiting time.A) P(atleast 15 mins)B) P(no... more
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02/05/24

Pick a card statistics
A card is chosen randomly from a standard deck. What is the probability it is an ace OR a red card? What is the probability is is an ace AND a red card?
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02/05/24

Conditional probability

Ryan pitched for his team 5/8 of the game and it rained for 3/10 of the game, and he pitched and it rained for 1/4 of the game. What is the probability that it rained, given that Ryan pitched?
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02/05/24

Probability picking 2 coins
One jar contains 15 quarters, 9 dimes, 10 nickels, and 6 pennies. A coin is chosen and not replaced, and then another one is chosen. Find P(dime, then nickel)Find P(both not dimes)
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02/04/24

Probability, true/false
Natalie guessed on the last three problems of her true/false test. What is the probability she got two right?
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02/04/24

Probability, number of outcomes
There is a bag with 5 green marbles and 8 blue marbles. A dice is rolled, then a marble is chosen. What are the number of outcomes?
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02/03/24

How do I know what statistical test to do, t-test (1-tailed or 2-tailed?) or ANOVA (which one?)
I did an experiment and had one independent variable and 2 dependent variables. Basically I tested diff. concentrations of an inhibitor on an enzyme and determined the enzyme's activity by... more
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Statistics

02/03/24

The round off errors when measuring the distance that a long jumper has jumped is uniformly distributed between 0 and 5.3 mm. Round values to 4 decimal places when possible.
The round off errors when measuring the distance that a long jumper has jumped is uniformly distributed between 0 and 5.3 mm. Round values to 4 decimal places when possible. The mean of this... more
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Statistics

02/03/24

If 41 Americans are randomly selected, find the probability that
65% of all Americans live in cities with population greater than 100,000 people. If 41 Americans are randomly selected, find the probability thata. Exactly 24 of them live in cities with population... more
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Statistics

02/03/24

If 44 bald eagles are randomly selected, find the probability that
74% of all bald eagles survive their first year of life. Give your answers as decimals, not percents. If 44 bald eagles are randomly selected, find the probability thata. Exactly 31 of them survive... more
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Statistics

02/03/24

If 31 Americans are randomly selected, find the probability that
17% of all Americans live in poverty. If 31 Americans are randomly selected, find the probability thata. Exactly 4 of them live in poverty. b. At most 4 of them live in poverty. c. At least 6 of... more
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Statistics

02/03/24

If 39 owned dogs are randomly selected, find the probability that
70% of owned dogs in the United States are spayed or neutered. Round your answers to four decimal places. If 39 owned dogs are randomly selected, find the probability thata. Exactly 29 of them are... more
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Statistics

02/03/24

Find the expected value for your profit
The student council is hosting a drawing to raise money for scholarships. They are selling tickets for $8 each and will sell 600 tickets. There is one $1,000 grand prize, three $500 second prizes,... more
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Statistics

02/02/24

I can not figure out how to solve these probkens
A poker hand consisting of 4 cards is dealt from a standard deck of 52 cards. Find the probability that the hand contains exactly 2 face cards
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Statistics

02/02/24

I don’t have csv for this problem but can you help on the process for each
Problem I. Continuing on from HW1 Problem 1We are still interested is studying the relationship between egg shell thickness and log concentration ofDDE. Use the regression results from the... more
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Statistics

02/02/24

Provided code and answer in r studio

The following data contains the Price, Age and Miles of 25 mustang cars.• Price - Asking price (in $1,000’s)• Miles - Mileage on the car (in 1,000’s)• Age - Age of the car (in years)#Run this code... more
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