Plus-Minus Notation. There are times where you'd like to write an expression such as 3±2. This expression has two results, one from adding the numbers and another from subtracting the numbers. In this case, 3±2 results in the numbers 3+2=5 and 3-2=1 1. Evaluate 5±7 In Statistics + notation can be seen in formulas when constructing the confidence intervals for some parameters. 2. Evaluate 3.41±√√4.6 rounded to the nearest hundredth For example: Confident Interval for population mean can be written as ± (sample mean Margin of Error) or (±E) Confidence Interval for population proportion can be written as ± (sample proportion Margin of Error) or (±E) 3. Find confidence interval for the population mean if sample mean =68 and Margin of Error E=0.8225 (67.1775, 68.8225) 4. Construct confidence interval for population proportion if sample proportion P = 0.6 and Margin of Error E-0.036 (0.564, 0.636)

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter9: Solving Quadratic Functions
Section: Chapter Questions
Problem 4CA
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Plus-Minus Notation.
There are times where you'd like to write an expression such as 3±2. This expression has two
results, one from adding the numbers and another from subtracting the numbers. In this case,
3±2 results in the numbers 3+2=5 and 3-2=1
1. Evaluate 5±7
In Statistics #notation can be seen in formulas when constructing the confidence intervals for
some parameters.
For example:
Confident Interval for population mean can be written as
±
(sample mean Margin of Error) or
2. Evaluate 3.41± √4.6 rounded to the
nearest hundredth
(x ±E)
Confidence Interval for population proportion can be written as
± Margin of Error) or (±E)
or
(sample proportion Margin of Error)
(67.1775, 68.8225)
3. Find confidence interval for the population mean if sample mean x=68 and Margin of Error
E=0.8225
(0.564, 0.636)
4. Construct confidence interval for population proportion if sample proportion P = 0.6 and
Margin of Error E=0.036
Transcribed Image Text:Plus-Minus Notation. There are times where you'd like to write an expression such as 3±2. This expression has two results, one from adding the numbers and another from subtracting the numbers. In this case, 3±2 results in the numbers 3+2=5 and 3-2=1 1. Evaluate 5±7 In Statistics #notation can be seen in formulas when constructing the confidence intervals for some parameters. For example: Confident Interval for population mean can be written as ± (sample mean Margin of Error) or 2. Evaluate 3.41± √4.6 rounded to the nearest hundredth (x ±E) Confidence Interval for population proportion can be written as ± Margin of Error) or (±E) or (sample proportion Margin of Error) (67.1775, 68.8225) 3. Find confidence interval for the population mean if sample mean x=68 and Margin of Error E=0.8225 (0.564, 0.636) 4. Construct confidence interval for population proportion if sample proportion P = 0.6 and Margin of Error E=0.036
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