Elementary Statistics Plus MyLab Statistics with Pearson eText -- Access Card Package (7th Edition) (What's New in Statistics)
7th Edition
ISBN: 9780134684901
Author: Ron Larson, Betsy Farber
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 4.1, Problem 6TY
Find the variance and standard deviation of the
TRY IT YOURSELF 2
A company tracks the number of sales new employees make each day during a 100-day probationary period. The results for one new employee are shown at the left. Construct a probability distribution for the random variable x. Then graph the distribution using a histogram.
Frequency Distribution
| Sales per days, x | Number of days, f |
| 0 | 16 |
| 1 | 19 |
| 2 | 15 |
| 3 | 21 |
| 4 | 9 |
| 5 | 10 |
| 6 | 8 |
| 7 | 2 |
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A poll before the elections showed that in a given sample 79% of people vote for candidate C. How many people should be interviewed so that the pollsters can be 99% sure that from 75% to 83% of the population will vote for candidate C? Round your answer to the whole number.
Suppose a random sample of 459 married couples found that 307 had two or more personality preferences in common. In another random sample of 471 married couples, it was found that only 31 had no preferences in common. Let p1 be the population proportion of all married couples who have two or more personality preferences in common. Let p2 be the population proportion of all married couples who have no personality preferences in common. Find a95% confidence interval for . Round your answer to three decimal places.
A history teacher interviewed a random sample of 80 students about their preferences in learning activities outside of school and whether they are considering watching a historical movie at the cinema. 69 answered that they would like to go to the cinema. Let p represent the proportion of students who want to watch a historical movie. Determine the maximal margin of error. Use α = 0.05. Round your answer to three decimal places.
Chapter 4 Solutions
Elementary Statistics Plus MyLab Statistics with Pearson eText -- Access Card Package (7th Edition) (What's New in Statistics)
Ch. 4.1 - Determine whether each random variable x is...Ch. 4.1 - A company tracks the number of sales new employees...Ch. 4.1 - Verify that the distribution you constructed in...Ch. 4.1 - Determine whether each distribution is a...Ch. 4.1 - Find the mean of the probability distribution you...Ch. 4.1 - Find the variance and standard deviation of the...Ch. 4.1 - At a raffle, 2000 tickets are sold at 5 each for...Ch. 4.1 - What is a random variable? Give an example of a...Ch. 4.1 - What is a discrete probability distribution? What...Ch. 4.1 - Is the expected value of the probability...
Ch. 4.1 - What does the mean of a probability distribution...Ch. 4.1 - True or False? In Exercises 58, determine whether...Ch. 4.1 - True or False? In Exercises 58, determine whether...Ch. 4.1 - True or False? In Exercises 58, determine whether...Ch. 4.1 - True or False? In Exercises 58, determine whether...Ch. 4.1 - Graphical Analysis In Exercises 912, determine...Ch. 4.1 - Graphical Analysis In Exercises 912, determine...Ch. 4.1 - Graphical Analysis In Exercises 912, determine...Ch. 4.1 - Graphical Analysis In Exercises 912, determine...Ch. 4.1 - Discrete Variables and Continuous Variables In...Ch. 4.1 - Discrete Variables and Continuous Variables In...Ch. 4.1 - Discrete Variables and Continuous Variables In...Ch. 4.1 - Discrete Variables and Continuous Variables In...Ch. 4.1 - Discrete Variables and Continuous Variables In...Ch. 4.1 - Discrete Variables and Continuous Variables In...Ch. 4.1 - Constructing and Graphing Discrete Probability...Ch. 4.1 - Constructing and Graphing Discrete Probability...Ch. 4.1 - Finding Probabilities Use the probability...Ch. 4.1 - Finding Probabilities Use the probability...Ch. 4.1 - Unusual Events In Exercise 19, would it be unusual...Ch. 4.1 - Unusual Events In Exercise 20, would it be unusual...Ch. 4.1 - Determining a Missing Probability In Exercises 25...Ch. 4.1 - Determining a Missing Probability In Exercises 25...Ch. 4.1 - Identifying Probability Distributions In Exercises...Ch. 4.1 - Identifying Probability Distributions In Exercises...Ch. 4.1 - Finding the Mean, Variance, and Standard Deviation...Ch. 4.1 - Baseball The number of games played in each World...Ch. 4.1 - Finding the Mean, Variance, and Standard Deviation...Ch. 4.1 - Finding the Mean, Variance, and Standard Deviation...Ch. 4.1 - Hurricanes The histogram shows the distribution of...Ch. 4.1 - Reviewer Ratings The histogram shows the reviewer...Ch. 4.1 - Writing The expected value of an accountants...Ch. 4.1 - Writing In a game of chance, what is the...Ch. 4.1 - Finding an Expected Value In Exercises 37and 38,...Ch. 4.1 - A high school basketball team is selling 10 raffle...Ch. 4.1 - Linear Transformation of a Random Variable In...Ch. 4.1 - Prob. 40ECh. 4.1 - What is the average sum of their scores? What is...Ch. 4.1 - What is the standard deviation of the difference...Ch. 4.2 - Determine whether the experiment is a binomial...Ch. 4.2 - A card is selected from a standard deck and...Ch. 4.2 - A survey found that 52% of U.S. adults associate...Ch. 4.2 - The survey in Example 5 found that 27% of U.S....Ch. 4.2 - About 5% of workers (ages 16 years and older) in...Ch. 4.2 - A recent study found that 28% of U.S. adults read...Ch. 4.2 - In San Francisco, California, about 44% of the...Ch. 4.2 - In a binomial experiment, what does it mean to say...Ch. 4.2 - In a binomial experiment with n trials, what does...Ch. 4.2 - Graphical Analysis In Exercises 35, the histogram...Ch. 4.2 - Graphical Analysis In Exercises 35, the histogram...Ch. 4.2 - Graphical Analysis In Exercises 35, the histogram...Ch. 4.2 - Graphical Analysis In Exercises 68, the histogram...Ch. 4.2 - Graphical Analysis In Exercises 68, the histogram...Ch. 4.2 - Graphical Analysis In Exercises 68, the histogram...Ch. 4.2 - Identify the unusual values of x in each histogram...Ch. 4.2 - Identify the unusual values of x in each histogram...Ch. 4.2 - Mean, Variance, and Standard Deviation In...Ch. 4.2 - Mean, Variance, and Standard Deviation In...Ch. 4.2 - Mean, Variance, and Standard Deviation In...Ch. 4.2 - Mean, Variance, and Standard Deviation In...Ch. 4.2 - Identifying and Understanding Binomial Experiments...Ch. 4.2 - Identifying and Understanding Binomial Experiments...Ch. 4.2 - Identifying and Understanding Binomial Experiments...Ch. 4.2 - Identifying and Understanding Binomial Experiments...Ch. 4.2 - Finding Binomial Probabilities In Exercises 1926,...Ch. 4.2 - Finding Binomial Probabilities In Exercises 1926,...Ch. 4.2 - Finding Binomial Probabilities In Exercises 1926,...Ch. 4.2 - Finding Binomial Probabilities In Exercises 1926,...Ch. 4.2 - Finding Binomial Probabilities In Exercises 1926,...Ch. 4.2 - Finding Binomial Probabilities In Exercises 1926,...Ch. 4.2 - Finding Binomial Probabilities In Exercises 1926,...Ch. 4.2 - Finding Binomial Probabilities In Exercises 1926,...Ch. 4.2 - Constructing and Graphing Binomial Distributions...Ch. 4.2 - Constructing and Graphing Binomial Distributions...Ch. 4.2 - Constructing and Graphing Binomial Distributions...Ch. 4.2 - Constructing and Graphing Binomial Distributions...Ch. 4.2 - Finding and Interpreting Mean, Variance, and...Ch. 4.2 - Finding and Interpreting Mean, Variance, and...Ch. 4.2 - Finding and Interpreting Mean, Variance, and...Ch. 4.2 - Finding and Interpreting Mean, Variance, and...Ch. 4.2 - Finding and Interpreting Mean, Variance, and...Ch. 4.2 - Finding and Interpreting Mean, Variance, and...Ch. 4.2 - Genetics According to a theory in genetics, when...Ch. 4.2 - Genetics Another proposed theory in genetics gives...Ch. 4.2 - Manufacturing An assembly line produces 10,000...Ch. 4.2 - Prob. 1ACh. 4.2 - Prob. 2ACh. 4.2 - For the election in Exercise 1, simulate selecting...Ch. 4.2 - 1. Construct a probability distribution for the...Ch. 4.2 - 2. Construct binomial probability distributions...Ch. 4.2 - 3. Compare your distributions from Exercise 1 and...Ch. 4.2 - 4. During the 2016 regular season, Kris Bryant of...Ch. 4.3 - The study in Example 1 found that the smartphones...Ch. 4.3 - What is the probability that more than four...Ch. 4.3 - Two thousand brown trout are introduced into a...Ch. 4.3 - In Exercises 14, find the indicated probability...Ch. 4.3 - Prob. 2ECh. 4.3 - In Exercises 14, find the indicated probability...Ch. 4.3 - Prob. 4ECh. 4.3 - In Exercises 58, find the indicated probability...Ch. 4.3 - Prob. 6ECh. 4.3 - In Exercises 58, find the indicated probability...Ch. 4.3 - In Exercises 58, find the indicated probability...Ch. 4.3 - Prob. 9ECh. 4.3 - In your own words, describe the difference between...Ch. 4.3 - Prob. 11ECh. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Using a Distribution to Find Probabilities In...Ch. 4.3 - Comparing Binomial and Poisson Distributions An...Ch. 4.3 - Hypergeometric Distribution Binomial experiments...Ch. 4.3 - Geometric Distribution: Mean and Variance In...Ch. 4.3 - Geometric Distribution: Mean and Variance In...Ch. 4.3 - Prob. 31ECh. 4.3 - Geometric Distribution: Mean and Variance In...Ch. 4 - In Exercises 13, assume the fire department...Ch. 4 - In Exercises 13, assume the fire department...Ch. 4 - In Exercises 13, assume the fire department...Ch. 4 - In Exercises 1 and 2, determine whether the random...Ch. 4 - In Exercises 1 and 2, determine whether the random...Ch. 4 - In Exercises 3 and 4, (a) construct a probability...Ch. 4 - In Exercises 3 and 4, (a) construct a probability...Ch. 4 - In Exercises 5 and 6, determine whether the...Ch. 4 - In Exercises 5 and 6, determine whether the...Ch. 4 - In Exercises 7 and 8, (a) find the mean, variance,...Ch. 4 - In Exercises 7 and 8, (a) find the mean, variance,...Ch. 4 - In Exercises 9 and 10, find the expected net gain...Ch. 4 - In Exercises 9 and 10, find the expected net gain...Ch. 4 - In Exercises 11 and 12, determine whether the...Ch. 4 - In Exercises 11 and 12, determine whether the...Ch. 4 - In Exercises 1316, find the indicated binomial...Ch. 4 - In Exercises 1316, find the indicated binomial...Ch. 4 - In Exercises 1316, find the indicated binomial...Ch. 4 - In Exercises 1316, find the indicated binomial...Ch. 4 - In Exercises 17 and 18, (a) construct a binomial...Ch. 4 - In Exercises 17 and 18, (a) construct a binomial...Ch. 4 - In Exercises 19 and 20, find the mean, variance,...Ch. 4 - In Exercises 19 and 20, find the mean, variance,...Ch. 4 - In Exercises 2126, find the indicated...Ch. 4 - Prob. 4.3.22RECh. 4 - In Exercises 2126, find the indicated...Ch. 4 - Prob. 4.3.24RECh. 4 - Prob. 4.3.25RECh. 4 - In Exercises 2126, find the indicated...Ch. 4 - Determine whether the random variable x is...Ch. 4 - The table lists the number of wireless devices per...Ch. 4 - Prob. 3CQCh. 4 - The five-year success rate of kidney transplant...Ch. 4 - An online magazine finds that the mean number of...Ch. 4 - Basketball player Dwight Howard makes a free throw...Ch. 4 - Which event(s) in Exercise 6 can be considered...Ch. 4 - In Exercises 13find the indicated probabilities...Ch. 4 - In Exercises 13, find the indicated probabilities...Ch. 4 - In Exercises 13find the indicated probabilities...Ch. 4 - Determine whether the distribution is a...Ch. 4 - The table shows the ages of students in a freshman...Ch. 4 - Seventy-seven percent of U.S. college students pay...Ch. 4 - The Centers for Disease Control and Prevention...Ch. 4 - The Centers for Disease Control and Prevention...Ch. 4 - Suspicious Samples? A lab worker tells you that...Ch. 4 - In Exercises 17, consider a grocery store that can...Ch. 4 - In Exercises 17, consider a grocery store that can...Ch. 4 - Prob. 3TCh. 4 - Prob. 4TCh. 4 - Prob. 5TCh. 4 - In Exercises 17, consider a grocery store that can...Ch. 4 - In Exercises 17, consider a grocery store that can...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- A random sample of medical files is used to estimate the proportion p of all people who have blood type B. If you have no preliminary estimate for p, how many medical files should you include in a random sample in order to be 99% sure that the point estimate will be within a distance of 0.07 from p? Round your answer to the next higher whole number.arrow_forwardA clinical study is designed to assess the average length of hospital stay of patients who underwent surgery. A preliminary study of a random sample of 70 surgery patients’ records showed that the standard deviation of the lengths of stay of all surgery patients is 7.5 days. How large should a sample to estimate the desired mean to within 1 day at 95% confidence? Round your answer to the whole number.arrow_forwardA clinical study is designed to assess the average length of hospital stay of patients who underwent surgery. A preliminary study of a random sample of 70 surgery patients’ records showed that the standard deviation of the lengths of stay of all surgery patients is 7.5 days. How large should a sample to estimate the desired mean to within 1 day at 95% confidence? Round your answer to the whole number.arrow_forward
- In the experiment a sample of subjects is drawn of people who have an elbow surgery. Each of the people included in the sample was interviewed about their health status and measurements were taken before and after surgery. Are the measurements before and after the operation independent or dependent samples?arrow_forwardiid 1. The CLT provides an approximate sampling distribution for the arithmetic average Ỹ of a random sample Y₁, . . ., Yn f(y). The parameters of the approximate sampling distribution depend on the mean and variance of the underlying random variables (i.e., the population mean and variance). The approximation can be written to emphasize this, using the expec- tation and variance of one of the random variables in the sample instead of the parameters μ, 02: YNEY, · (1 (EY,, varyi n For the following population distributions f, write the approximate distribution of the sample mean. (a) Exponential with rate ẞ: f(y) = ß exp{−ßy} 1 (b) Chi-square with degrees of freedom: f(y) = ( 4 ) 2 y = exp { — ½/ } г( (c) Poisson with rate λ: P(Y = y) = exp(-\} > y! y²arrow_forward2. Let Y₁,……., Y be a random sample with common mean μ and common variance σ². Use the CLT to write an expression approximating the CDF P(Ỹ ≤ x) in terms of µ, σ² and n, and the standard normal CDF Fz(·).arrow_forward
- matharrow_forwardCompute the median of the following data. 32, 41, 36, 42, 29, 30, 40, 22, 25, 37arrow_forwardTask Description: Read the following case study and answer the questions that follow. Ella is a 9-year-old third-grade student in an inclusive classroom. She has been diagnosed with Emotional and Behavioural Disorder (EBD). She has been struggling academically and socially due to challenges related to self-regulation, impulsivity, and emotional outbursts. Ella's behaviour includes frequent tantrums, defiance toward authority figures, and difficulty forming positive relationships with peers. Despite her challenges, Ella shows an interest in art and creative activities and demonstrates strong verbal skills when calm. Describe 2 strategies that could be implemented that could help Ella regulate her emotions in class (4 marks) Explain 2 strategies that could improve Ella’s social skills (4 marks) Identify 2 accommodations that could be implemented to support Ella academic progress and provide a rationale for your recommendation.(6 marks) Provide a detailed explanation of 2 ways…arrow_forward
- Question 2: When John started his first job, his first end-of-year salary was $82,500. In the following years, he received salary raises as shown in the following table. Fill the Table: Fill the following table showing his end-of-year salary for each year. I have already provided the end-of-year salaries for the first three years. Calculate the end-of-year salaries for the remaining years using Excel. (If you Excel answer for the top 3 cells is not the same as the one in the following table, your formula / approach is incorrect) (2 points) Geometric Mean of Salary Raises: Calculate the geometric mean of the salary raises using the percentage figures provided in the second column named “% Raise”. (The geometric mean for this calculation should be nearly identical to the arithmetic mean. If your answer deviates significantly from the mean, it's likely incorrect. 2 points) Starting salary % Raise Raise Salary after raise 75000 10% 7500 82500 82500 4% 3300…arrow_forwardI need help with this problem and an explanation of the solution for the image described below. (Statistics: Engineering Probabilities)arrow_forwardI need help with this problem and an explanation of the solution for the image described below. (Statistics: Engineering Probabilities)arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill
Big Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin Harcourt
Glencoe Algebra 1, Student Edition, 9780079039897...
Algebra
ISBN:9780079039897
Author:Carter
Publisher:McGraw Hill
Big Ideas Math A Bridge To Success Algebra 1: Stu...
Algebra
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:Houghton Mifflin Harcourt
Mod-01 Lec-01 Discrete probability distributions (Part 1); Author: nptelhrd;https://www.youtube.com/watch?v=6x1pL9Yov1k;License: Standard YouTube License, CC-BY
Discrete Probability Distributions; Author: Learn Something;https://www.youtube.com/watch?v=m9U4UelWLFs;License: Standard YouTube License, CC-BY
Probability Distribution Functions (PMF, PDF, CDF); Author: zedstatistics;https://www.youtube.com/watch?v=YXLVjCKVP7U;License: Standard YouTube License, CC-BY
Discrete Distributions: Binomial, Poisson and Hypergeometric | Statistics for Data Science; Author: Dr. Bharatendra Rai;https://www.youtube.com/watch?v=lHhyy4JMigg;License: Standard Youtube License