Essentials Of Statistics For Business & Economics
9th Edition
ISBN: 9780357045435
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Publisher: South-Western College Pub
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 11.1, Problem 7E
Halloween Spending. In 2017, Americans spent a record-high $9.1 billion on Halloween-related purchases (the balance website, https://www.thebalance.com /haIloween-spending-statistics-facts-and-trends-3305716). Sample data showing the amount, in dollars, 16 adults spent on a Halloween costume are as follows.
- a. What is the estimate of the population
mean amount adults spend on a Halloween costume? - b. What is the sample standard deviation?
- c. Provide a 95% confidence
interval estimate of the population standard deviation for the amount adults spend on a Halloween costume.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Is the normal distribution important in statistics analysis? If yes, why? If no, why?
Is the normal distribution always being defined by its mean and standard deviation? Discuss.
Discuss with examples
c) Graphs illustrating the problems and solutions are recommended
Final grades The data show the final grades for 16 randomly selected students in College Algebra and Statistics. Find the y-
value for the specified x-value. Remember that no regression should be done when r is not significant.
Student
2
3
4
5
6
7
8
College
89
56 99
61
74
57
98
95
HARRERS
75
55
64
62
80
70
93
91
Student
9
10
11
12
13
14
15
16
College
98
87
89
73
66
88
79
56
SABERS
92
71
89
79
76
78
68
57
Send data to Excel
The correlation coefficient for the data is r=0.684 and a=0.01. Should regression analysis be done?
The regression analysis should not be done.
The regression analysis should be done.
Find the equation of the regression line. Round the coefficients to at least three decimal places.
y'=a+bx
a =
b=
Find the predicted grade in Statistics when the College Algebra grade was 86. Round the answer to at least three
decimal places.
When a student gets 86 in College Algebra, we predict a, Statistics score of
.
Continue
×
G
Subnet Assignment
F4
F5
95
ཀུན
DII
D
F6
F7
FB
F9
F10…
= 5
6
= 7
8
9
10
11
12
13
14
15
16
Emergency Escape Plan A random sample of 180 residents of the Southeastern United States found 117 had no emergency escape plan for severe weather.
Find the 90% confidence interval of the true proportion of individuals living in the Southeastern United States who do not have an emergency escape plan for
severe weather. Use a graphing calculator. Round your answers to three decimal places.
X
1
G
Continue
Q
*
F2
A
2
N
#
*3
80
a
F3
F4
FS
$
54
%
5
+ 80
G
H
J
9
K
B
N
M
F11
יד
F12
0
P
}
1
L
...
Λ
.
H
command
option.
Chapter 11 Solutions
Essentials Of Statistics For Business & Economics
Ch. 11.1 - 1. Find the following chi-square distribution...Ch. 11.1 - Prob. 2ECh. 11.1 - A sample of 16 items provides a sample standard...Ch. 11.1 - Package Delivery by Drones. Amazon.com is testing...Ch. 11.1 - College Basketball Coaches’ Salaries. In 2018,...Ch. 11.1 - Volatility of General Electric Stock. To analyze...Ch. 11.1 - Halloween Spending. In 2017, Americans spent a...Ch. 11.1 - Variability in Daily Change in Stock Price....Ch. 11.1 - Aerospace Part Manufacturing. The competitive...Ch. 11.1 - Costco Customer Satisfaction. Consumer Reports...
Ch. 11.1 - Variability in GMAT Scores. In 2016, the Graduate...Ch. 11.1 - Vehicle Ownership by Fortune Magazine Subscribers....Ch. 11.2 - Find the following F distribution values from...Ch. 11.2 - A sample of 16 items from population 1 has a...Ch. 11.2 - Prob. 15ECh. 11.2 - Comparing Risk of Mutual Funds. Investors commonly...Ch. 11.2 - Repair Costs as Automobiles Age. In its 2016 Auto...Ch. 11.2 - Prob. 18ECh. 11.2 - Prob. 19ECh. 11.2 - Prob. 20ECh. 11.2 - Smartphone Battery Life. Battery life is an...Ch. 11.2 - Prob. 22ECh. 11 - 23. Because of staffing decisions, managers of the...Ch. 11 - Prob. 24SECh. 11 - Business Travel Costs. According to the 2017...Ch. 11 - Manufacture of Ball Bearings. Ball bearing...Ch. 11 - Count Chocula Cereal. Filling boxes with...Ch. 11 - OrderUp Food Delivery. OrderUp is a service that...Ch. 11 - Daily Patient Volume at Dental Clinic. A sample of...Ch. 11 - A sample standard deviation for the number of...Ch. 11 - Golf Scores. Is there any difference in the...Ch. 11 - Grade Point Average Comparison. The grade point...Ch. 11 - Weekly Cost Reporting. Stable cost reporting in a...Ch. 11 - Lean Process Improvement at the New York City Food...Ch. 11 - An Air Force introductory course in electronics...Ch. 11 - Meticulous Drill Reamer (MDR) specializes in...
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
- Cigarette Smoking A researcher found that a cigarette smoker smokes on average 31 cigarettes a day. She feels that this average is too high. She selected a random sample of 8 smokers and found that the mean number of cigarettes they smoked per day was 28. The sample standard deviation was 2.9. At a 0.01, is there enough evidence to support her claim? Assume that the population is approximately normally distributed. Use the critical value method and tables. Part: 0/5 Part 1 of 5 (a) State the hypotheses and identify the claim. μ ローロ 0arrow_forwardAccidents and Drivers' Ages For a random selection of drivers, their ages and the number of automobile accidents that they had over a 3-year period are shown. Is there a linear relationship between the variables? Use Age for the independent variable and Accidents for the dependent variable. 27 25 42 31 43 22 24 39 Age Accidents 4 3101562 Send data to Excel Part: 0/5 Part 1 of 5 (a) Draw the scatter plot for the variables. Drivers' Age and Accidents 10- Accidents 8- 7 3 2. 14 0 3 10 15 20 25 30 35 Age x Part: 1/5 Part 2 of 5 (b) Compute the value of the correlation coefficient. Round your answer to at least three decimal places. x Part: 2/5 Part 3 of 5 (c) State the hypotheses. Continue * 80 F3 a F4 # $ % G F5 < Submit Assignment 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center 1 Accessibility F6 & ཊུ8 DII A F7 F8 F9 F10arrow_forwardFast Food A deli manager wishes to see if there is a preference for the four types of hoagies it sells. The manager selects a week at random and records the number of hoagies of each type that the store sold. At a 0.01, is there a preference in the type of hoagies sold? Use the critical value method with The Chi-Square Distribution Table. Italian 74 Steak 52 Meatball 88 Vegetable 86 Send data to Excel Part: 0/5 Part 1 of 5 (a) Identify the claim with the correct hypothesis. Ho: Customers don't show a preference in the type of hoagie ordered. (Choose one) H₁: Customers show a preference in the type of hoagie ordered. (Choose one) x G Part: 1/5 Part 2 of 5 (b) Find the critical value. Use The Chi-Square Distribution Table. Round the answer to at least three decimal places. The critical value is Part: 2/5 Part 3 of 5 (c) Compute the test statistic. Round the intermediate and final answers to at least three decimal places. 2-1 Start over Part: 3/5 Part 4 of 5 (d) Make the decision. (Choose…arrow_forward8 19 10 11 12 13 14 15 16 Physical Therapy A random sample of 10 physical therapy patients who had knee surgery shows the angle of knee bend before physical therapy and after 6 weeks of physical therapy. At a 0.10, has there been an increase in the angle range after the therapy? Assume that all variables are normally distributed; use μ, for the "before" values and "D"₁₂. Use the critical value method and tables. Patient 1 2 3 4 S 6 7 8 9 10 Degrees before 81 84 91 66 67 92 90 93 87 62 Degrees after 120 125 129 104 106 122 119 126 115 136 Send data to Excel Part: 0/5 Part 1 of 5 (a) State the hypotheses and identify the claim. Ho (Choose one) H₁: (Choose one) This hypothesis test is a (Choose one) test. 0<0 Darrow_forward8 Español 10 11 12 13 14 15 Disabling Injuries Is the type of injury related to the age of the individual at a=0.05? Type Motor vehicle Home Work Public Under 35 35 and 26 24 29 26 11 18 36 34 I over Send data to Excel Part: 0/5 Part 1 of 5 (a) State the hypotheses and identify the claim. Ho: The type of injury is (Choose one) age. (Choose one) X H₁: The type of injury is (Choose one) age. (Choose one) Part: 1/5 Part 2 of 5 (b) Find the critical value. Round the answer to at least three decimal places. Use The Chi-Square Distribution Table. Critical value- x Part: 2/5 Part 3 of 5 (c) Compute the test statistic. Round the intermediate and final answers to at least three decimal places. 7-0 x の Part: 3/5 Part 4 of 5 (d) Make the decision. (Choose one) the null hypothesis. Part: 4/5 20 F3 a F4 G Reserved. Terms of Use Submit Assignment Privacy Center | Accessibility F5 95 8 DII F6 F7 F8 F9 F10 TAarrow_forwardEspa 3 4 5 -6 7 8 9 10 11 1 Divorce Rates The number of years that first-time married couples stay together before they divorce is shown. If the sample is random and is 2.1, find the 99% confidence interval for the mean. Round your answers to one decimal place. S 3 1 4 11 8 9 3 12 6 10 5 3 2 7 9 11 6 3 5 S 7 8 9 6 4 10 6 2 Send data to Excelarrow_forward13 14 15 16 Physical Therapy A random sample of 10 physical therapy patients who had knee surgery shows the angle of knee bend before physical therapy and after 6 weeks of physical therapy. At a 0.05, has there been an increase in the angle range after Use the HD-1-2- the therapy? Assume that all variables are normally distributed; use ₁ for the "before" values and critical value method and tables. Patient I 2 3 4 5 6 7 8 9 10 Degrees before 89 63 95 74 76 67 69 78 92 68 Degrees after 102 141 118 114 122 137 121 129 116 104 Send data to Excel Part: 0/5 Part 1 of 5 (a) State the hypotheses and identify the claim. Ho (Choose one) H₁: (Choose one) This hypothesis test is a (Choose one) test. 0>0 0<0 0x0 HD ローロ G Part: 1/5 Part 2 of 5 (b) Find the critical value(s). Round the answer(s) to at least three decimal places. If there is more than one critical value, separate them with comma Critical value(s): DO × G Part: 2/5 Part 3 of 5 (c) Compute the test statistic. Round Intermediate…arrow_forwardCigarette Smoking A researcher found that a cigarette smoker smokes on average 30 cigarettes a day. She feels that this average is too low. She selected a random sample of 8 smokers and found that the mean number of cigarettes they smoked per day was 32. The sample standard deviation was 2.8. At a 0.05, is there enough evidence to support her claim? Assume that the population is approximately normally distributed. Use the critical value method and tables. Part: 0/5 Part 1 of 5 (a) State the hypotheses and identify the claim. Ho H₁ (Choose one) (Choose one) This hypothesis test is a (Choose one) test. μ ロロ 0<0 ローロ O-O G Part: 1/5 C Part 2 of 5 (b) Find the critical value(s). Round the answer to three decimal places. If there is more than one critical value, seperate them with commas. Critical value(s): x Part: 2/5 Part 3 of 5 (c) Compute the test value. Always round r score values to three decimal places. 1 80 x Part: 3/5 Part 4 of 5 (d) Make the decision. (Choose one) the null…arrow_forwardEspañ 13 14 15 16 17 18 19 20 21 Essays A professor wishes to see if two groups of students' essays differ in lengths, that is, the number of words in each essay. The professor randomly selects 12 essays from a group of students who are science majors and 10 essays from a group of humanities majors to compare. The data are shown. Find the 99% confidence interval for the difference of the means. Assume the variables are normally distributed and the variances are unequal. Round the answers to at least one decimal place. Science majors Humanities majors 2299 3140 2409 3432 2708 1698 2699 1756 2161 5000 1960 2935 3998 3352 1599 3839 3694 2319 2043 2979 2282 2758 Send data to Excel Use MI for the mean length of the science majors' essays. << 20 F3 Continue G Submit Assignment a Å DII F4 F5 F6 F7 F8 중요 F9 F10arrow_forwardTeachers' Salaries California and New York lead the list of average teachers' salaries. The California yearly average is $65,493 while teachers in New York make an annual salary of $62,773. Random samples of 45 teachers from each state yielded the following. Sample mean Population standard California New York 65,493 62,773 8142 7821 Es deviation Send data to Excel Use #1 for the average teachers' salaries in California. At a 0.01, is there a difference in means of the salaries? Part: 0/5 Part 1 of 5 (a) State the hypotheses and identify the claim. Ho (Choose one) H₁(Choose one) This hypothesis test is a (Choose one) test. 0<0 0<0 ローロ H2 Part: 1/5 Part 2 of 5 (b) Find the critical value(s). Round the answer(s) to at least two decimal places. If there is more than one critical value, separate them with commas. Critical value(s): Part: 2/5 Part 3 of 5 (c) Compute the test value. Round the answer to at least two decimal places. Part: 3/5 Part 4 of 5 X (d) Make the decision. Continue Submit…arrow_forwardNew Automobile Ownership According to a survey, the average length of time a person keeps a new automobile is 70.5 months. The average time 30 randomly selected automobile owners kept their new automobiles was 70.1 months with a=4.1 months. At the 0.05 level of significance, can it be concluded that for this type of automobile, the owners kept their new automobiles less than 70.5 months? Assume that the population is normally distributed. Part 1 of 5 (a) State the hypotheses and identify the claim with the correct hypothesis. OO 0-0 0-0 μ Ho (Choose one) H₁ (Choose one) x This hypothesis test is a (Choose one) test. Part 2 of 5 (b) Find the critical value(s). Round the answer to at least two decimal places. If there is more than one critical value, separate them with commas. Critical value(s): x G Part 3 of 5 (c) Compute the test statistic. Always round z score values to at least two decimal places. G Part 4 of 5 (d) Make the decision. (Choose one) the null hypothesis. 3 Reserved Terms…arrow_forwardExercise A survey found the 25% of adults never exercise at all. A researcher selected a random sample of 120 adults and found that 34 adults said that they do not exercise at all. At a 0.10, is there sufficient evidence that more than 25% of adults do not exercise at all? Use the critical value method. Do not round intermediate steps. Part: 0/5 Part 1 of 5 (a) State the hypotheses and identify the claim. Ho (Choose one) 0-0 0O G Part: 1/5 Part 2 of 5 (b) Find the critical value. Round the answer to at least two decimal places. The critical value is G Part: 2/5 Part 3 of 5 (c) Compute the test statistic. Round the sample proportion to three decimal places and score values to at least two decimal places. × Part: 3/5 Part 4 of 5 (d) Make the decision. (Choose one) the null hypothesis. x Part: 4/5 Continue a F5 95 80 F3 F4 Submit Assignment 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility F8 4 F9 K DII F6 F7arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_iosRecommended 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
Holt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL
Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillBig Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin HarcourtHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL
The Shape of Data: Distributions: Crash Course Statistics #7; Author: CrashCourse;https://www.youtube.com/watch?v=bPFNxD3Yg6U;License: Standard YouTube License, CC-BY
Shape, Center, and Spread - Module 20.2 (Part 1); Author: Mrmathblog;https://www.youtube.com/watch?v=COaid7O_Gag;License: Standard YouTube License, CC-BY
Shape, Center and Spread; Author: Emily Murdock;https://www.youtube.com/watch?v=_YyW0DSCzpM;License: Standard Youtube License