Sample size: Penny abolition
Not what you're looking for?
A researcher wishes to estimate, with 90% confidence, the percentage of adults who support abolishing the penny. His estimate must be accurate within 2% of the true proportion.
a) Find the minimum sample size needed, using a prior study that found that 24% of the respondents said they support abolishing the penny.
b) No preliminary estimate is available. Find the minimum sample size needed.
A)What is the minimum sample size needed, using a prior study that found that 24% of the respondents said they support abolishing the penny?
n= _______ (round up to the nearest whole number as needed).
B)What is the minimum sample size needed assuming that no prior information is available?
n= _____ (round up to the nearest whole number as needed)
Purchase this Solution
Solution Summary
The solution provides step by step method for the calculation of sample size. Formula for the calculation and Interpretations of the results are also included.
Solution Preview
Please see the attachments.
Statistics
A researcher wishes to estimate, with 90% confidence, the percentage of adults who support abolishing the penny. His estimate must be accurate within 2% of the true proportion.
a) Find the minimum sample size needed, using a prior study that found that 24% of the respondents said they support abolishing the penny. ...
Purchase this Solution
Free BrainMass Quizzes
Probability Quiz
Some questions on probability
Exponential Expressions
In this quiz, you will have a chance to practice basic terminology of exponential expressions and how to evaluate them.
Solving quadratic inequalities
This quiz test you on how well you are familiar with solving quadratic inequalities.
Multiplying Complex Numbers
This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form.
Know Your Linear Equations
Each question is a choice-summary multiple choice question that will present you with a linear equation and then make 4 statements about that equation. You must determine which of the 4 statements are true (if any) in regards to the equation.