Symbols
This symbol represents the sample proportion.
What is p_hat?
This is a characteristic of the population.
What is a parameter?
This represents the general equation for a confidence interval.
What is point estimate +- margin of error?
This is the equation for calculating the margin of error from a confidence interval.
What is ( B - A ) / 2?
This is the four step process for calculating confidence intervals.
What is State, Plan, Do, Conclude?
This symbol represents the sample mean.
What is x_bar?
This is a calculation based on a sample.
What is a statistic?
This is the equation for calculating the point estimate from a confidence interval.
What is (A + B)/2 ?
This happens to the margin of error when the sample size increases.
What is goes down or decreases?
These are the four steps for the Do part of the 4-step process.
This symbol represents the sample statistic for standard deviation.
What is Sx ?
This represents the number of objects in a sample that are free to vary.
What is degrees of freedom?
This is the equation for finding the margin of error from a confidence interval.
What is ( B - A ) / 2 ?
This happens to the margin of error when the confidence level increases.
What is goes up or increases?
This is the multiplier (z*) for a confidence level of 90%.
What is 1.645?
This symbol represents the multiplier used to calculate the confidence interval for a sample proportion.
What is z* (z star)?
This is a single number calculated from a sample and used to estimate a population parameter.
What is the point estimate?
This equation represents the standard error of a sample proportion.
What is the square root of p * (p-1) / n ?
This is margin of error for a 90% confidence interval of a sample mean with a standard deviation of 3 and a sample size of 30.
What is +- 0.931?
These are used to locate the multiplier (t*) for the confidence interval of a mean on table B.
What is the confidence level or degrees of freedom?
This symbol represents the multiplier used to calculate the confidence interval for a sample mean.
What is t* (t star)?
This is the error bound for a population parameter.
What is the margin of error?
This is the equation for finding the confidence interval for a sample mean.
What is x_bar +- t* times Sx divided by the square root of n?
This is the margin of error for a 95% confidence interval with a sample proportion of 35% and a sample size of 30.
What is +- 0.171 ?
This is the 80% confidence interval for a sample mean of 3.4 and a standard deviation of 4 with a sample size of 25.
What is 3.4 +- 1.0544 or (2.346, 4.454) ?