8,918 Answered Questions for the topic statistics

Statistics

09/24/24

dult 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 3.5357 (to 4 decimal places)
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Statistics Math

09/23/24

Stat/probability question
Suppose there is an intersection in a street where crossing diagonally is allowed. The four corners form a square and there is a person at each of the four corners. Each person crosses randomly in... more
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Statistics

09/22/24

How do I calculate probability of face cards with a tree diagram?
In poker we are dealt two cards from the deck (without replacement). I am interested in the number of ’face cards’ I get. We define a J, Q, K and Ace to be ’face cards’. Construct a tree diagram... more
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Statistics

09/21/24

How to cancel an appointment
Something has come up and I need to cancel an upcoming session
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Statistics

09/20/24

74% of all bald eagles survive their first year of life. Give your answers as decimals, not percents. If 33 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 33 bald eagles are randomly selected, find the probability thata. Exactly 26 of them survive... more
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Statistics

09/20/24

64% of all violent felons in the prison system are repeat offenders. If 34 violent felons are randomly selected, find the probability that  
64% of all violent felons in the prison system are repeat offenders. If 34 violent felons are randomly selected, find the probability that  a. Exactly 20 of them are repeat offenders. ?b. At most... more
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Statistics

09/20/24

14% of all Americans live in poverty. If 49 Americans are randomly selected, find the probability that
14% of all Americans live in poverty. If 49 Americans are randomly selected, find the probability thata. Exactly 9 of them live in poverty. ?b. At most 9 of them live in poverty. ?c. At least 9 of... more
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Statistics

09/19/24

How do I calculate the percentage of data within one standard deviation of the mean?
Using the sample set 4, 9, 10, 13, 16, 17, 18, 22, 23, 38 and knowing that the mean is 17 and the standard deviation for the sample set is 9.439 how do I calculate the percentage of data within one... more
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Statistics

09/19/24

Math 1280 unit 2
We are given a table for the city of Detroit, Michigan USA for the period of 1961 to 1973 with the following information: a column with the number of full-time police per 100,000 citizens and a... more
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Statistics

09/17/24

Dashboard Update
Hello team,My tutor sent me a message to decline the meeting request due to the conflict. However, the dashboard still shows the lesson on the calendar.How the dashboard can be updated, so my... more
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Statistics

09/17/24

What is the value of the correlation coefficient r
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Statistics

09/17/24

Use the quadratic model to predict the exam score for someone who works 100 problems

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Statistics

09/13/24

Mean, median, and mode in a statistical survey
I am working on a presentation and we are asked to provide a mean, median, and mode for the survey we conducted from 10 people. Do I create a mean, median, and mode for each of the 8 questions?How... more
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Statistics Math

09/11/24

A company charges $40 for a one-year extended warranty on their product in case the product fails within one year of the purchase date.
A company charges $40 for a one-year extended warranty on their product in case the product fails within one year of the purchase date. They know 1% of their products will fail during this time,... more
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Statistics

09/10/24

Suppose that 31% of people own dogs. If you pick two people at random, what is the probability that they both own a dog?
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Statistics Math

09/03/24

Can we use the proportion from #6 to estimate the proportion of the total adult population who does not use drugs? Why
Question #6: Find the proportion of applicants who do not use drugs.Answer: 505/555 = 0.9099
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Statistics Math Probability

08/30/24

expected value question
Phil is told there are 3 aces and 3 kings in a pile of cards. In each turn, a card is drawn without replacement, and Phil earns $1 if he guesses the drawn card correctly. Phil plays 6 turns... more
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Statistics

08/28/24

When to use a z score versus a t score ?
How do I determine whether to use a z score versus a t score ?
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Statistics Math Probability

08/28/24

Advanced Probability Question
Person A has a 30 sided and person B has a 20 sided die. both players role and the person with the highest role win (on a draw B wins). the loser pays the winner the value of the winners die. 1.... more
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Statistics

08/15/24

Statistics problem
What is the range of fuel efficiency for cars within 1σ of the mean? a. 24 mpg – 34 mpg b. 28 mpg – 30 mpg c. 29 mpg – 34 mpg d. −1 mpg – +1 mpg What percent of all cars get less than 20 mpg? a.... more
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08/03/24

Find the Interquartile Range, Mode, Variance and Standard Deviation for given data
Based on the given grouped data in the table in the attached image: https://ibb.co/1GhcbzB , for time taken for students travelling to their college,how can I finda) The Interquartile rangeb) the... more
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Statistics Math

07/28/24

Probability of choosing an animal
At the animal shelter where Miguel volunteers on the weekends, there were three Siamese cats, five tabby cats, eighteen mixed-breed dogs, and two iguanas in their cages. If a customer picks any of... more
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Statistics Math

07/28/24

Probability of Yes and no answers

Sara came across a new website that featured a "live" fortune-teller. She typed in three questions and found (shockingly) that the fortune-teller could only answer yes or no to her questions.... more
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Statistics

07/27/24

How to get the test statistic for a sample
Test the following claim (h1) at a significance level of alpha=0.05. H0:p1=p2. H1:p1<p2. you obtain 10.8% successes in a sample of size n1=701 from the first population. You obtain 12.3%... more
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Statistics

07/24/24

need stats help pls

In 1940 the average size of a U.S. farm was 174 acres. Let's say that the standard deviation was 57 acres. Suppose we randomly survey 48 farmers from 1940The middle 50% of the distribution... more
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