A survey that collected demographic data from respondents asked them to categorize their annual incomes (in thousands of dollars) into the groups in the table below. The number of respondents for each income group is also shown in the table. Income Number of Respondents$20 to under $30 68$30 to under $40 113$40 to under $50 125$50 to under $60 23$60 to under $70 36 Calculate the approximate variance and standard deviation of the incomes of the respondents. The approximate variance of the incomes of the respondents is __thousand. (Round to two decimal places as needed.)
A survey that collected demographic data from respondents asked them to categorize their annual incomes (in thousands of dollars) into the groups in the table below. The number of respondents for each income group is also shown in the table. Income Number of Respondents$20 to under $30 68$30 to under $40 113$40 to under $50 125$50 to under $60 23$60 to under $70 36 Calculate the approximate variance and standard deviation of the incomes of the respondents. The approximate variance of the incomes of the respondents is __thousand. (Round to two decimal places as needed.)
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 3CYU
Related questions
Question
A survey that collected demographic data from respondents asked them to categorize their annual incomes (in thousands of dollars) into the groups in the table below. The number of respondents for each income group is also shown in the table.
Income Number of Respondents
$20 to under $30 68
$30 to under $40 113
$40 to under $50 125
$50 to under $60 23
$60 to under $70 36
$20 to under $30 68
$30 to under $40 113
$40 to under $50 125
$50 to under $60 23
$60 to under $70 36
Calculate the approximate variance and standard deviation of the incomes of the respondents.
The approximate variance of the incomes of the respondents is __thousand.
(Round to two decimal places as needed.)
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
Recommended textbooks for you
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
Holt Mcdougal Larson Pre-algebra: Student Edition…
Algebra
ISBN:
9780547587776
Author:
HOLT MCDOUGAL
Publisher:
HOLT MCDOUGAL
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
Holt Mcdougal Larson Pre-algebra: Student Edition…
Algebra
ISBN:
9780547587776
Author:
HOLT MCDOUGAL
Publisher:
HOLT MCDOUGAL