Concept explainers
a.
To fill: The blanks in thegiven statement with appropriate words.
a.
Answer to Problem 67E
95%, 9.6956 and 15.0084.
Explanation of Solution
Given information:
Confidence interval is the
Thus, the complete statement is, “ We are
b.
To find:The 99% confidence interval.
b.
Answer to Problem 67E
The confidence interval is
Explanation of Solution
Given:
Confidence level = 99%
Formula used:
Calculation:
The value of
The 99% confidence interval using the provided output can be calculated as:
Hence, the confidence interval is
c.
To find: The
c.
Answer to Problem 67E
The required sample size is 72.
Explanation of Solution
Given:
Formula used:
Calculation:
The value of
The sample size at
Hence, the sample size is 72.
d.
To find: The sample size to have the margin of error of 1.5 at
d.
Answer to Problem 67E
The required sample size is 125.
Explanation of Solution
Given:
Formula used:
Calculation:
The value of
The sample size at
Hence, the sample size is 125.
Want to see more full solutions like this?
Chapter 8 Solutions
ELEMENTARY STATISTICS(LL)(FD)
- 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