Chapter 9 Estimating the Value of a Parameter Flashcards
Obtain a point estimate for the population proportion. Construct and interpret a confidence interval for the population proportion. Determine the sample size necessary for a specified margin of error. Obtain a point estimate for the population mean and understand the Student’s T distribution. Construct and interpret a confidence interval for a population mean.
1
Q
The point estimate of the population mean, μ
A
the sample mean, x¯ (x-bar)
2
Q
Calculating a confidence interval about a population mean using TI-84 calculator
A
STAT>Edit Enter data in L1 STAT>TESTS>8: T-Interval Highlight Data (flashing), set list to L1 and frequency to 1 Enter confidence level following C-Level Highlight Calculate: press enter
3
Q
Calculating the sample size needed for estimating a sample mean
A
n = (z sub alpha * s/E)squared
4
Q
Calculating the sample size needed for estimating a sample mean using Microsoft Excel
A
=(NORM,S,INV(1-alpha/2)*s(Error)^2
5
Q
Two Types of Inferential Statistics
A
- Estimation
2. Hypothesis Testing
