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The value(s) assigned to a population parameter based on the alue of a sample statistic is called ____________.
The sample statistic used to estimate a population parameter is called __________.

A __________ is a single value (or point) used to approximate a population parameter.
Point Estimate

An interval constructed around the value of a sample statistic (point estimate) to estimate the corresponding population paramter is the _______________ or __________.
 confidence interval
 interval estimate

A ______________ is a range or interval of values used to estimate the true value of a population parameter.
Confidence interval

The ____________ is the probability that the confidence interval actually does contain the population parameter. It is also called the ________ or the _____________.
 confidence level
 degree of confidence
 confidence coefficient


When interpreting a confidence interval which is correct to say:
1. "there is a 95% chance that...."
2. "We are 95% confident that the interval..."
Number 2

What is a number on the borderline separating sample statistics that are likely to occur from those that are unlikely to occur?
Critical Value

The number _____ is a critical value that is a z score with the property it separates an area of _____ in the right tail of the standard normal distribution.

The difference between the sample proportion and the population proportion can be thought of as ___________
Margin of Error E

What are the requirements to construct a confidence interval for estimating a population Proportion P and how is the confidence interval found?
 1. Requirements:
  sample is a simple random sample.
  conditions for the binaomial distribution are satisfied.
 2. Confidence interval

 where:

The confidence interval is often expressin in the what equivalent formats?
 OR


When analyzing results from polls, what four things should be considered?
 1. sample should be a simple random sample.
 2. confidence level should be provided.
 3. sample size should be provided.
 4. Except for relatively rare cases, quality of poll depends on sampling method and size of the sample. population size is usually not a factor.

How is the sample size determined in order to estimate the population proportion p?
1. when an estimate is known?
2. when an estimate is not known?
3. What is the roundoff rule for determining sample size?
 1. whan an estimate is known:
 2. when an estimate is not known:
3. If not a whole number, round the value of n up to the next larger whole number.

If the confidence interval limits are known,
1. how is the point estimate of found?
2. How is the Margin of Error found?
= [(upper confidence interval limit)+(lower confidence interval lmit)]/2
E=[(upper confidence interval limit)+(lower confidence interval lmit)]/2

How is the confidence interval or estimating a population mean (with known)?
 where

What is the roundoff rule for confidence intervals used to estimate ?
When using the orginal set of data, round to one more decimal place than is used for the original set of data.
When the original set of data is unknown, only , is used, round to the same number of decimal places used for the sample mean.

How is the sample size required to estimate a population mean found?

How is a Sample Size with unknown found?
1. use range rule of thumb .
2. Start sample collection process, using the first several values, calculuate the sample standard deviation s and use it in place of
3. Estimate by using results of some other study done earlier.

The difference between the value of a sample statistic obtained from a sample and the value of the corresponding population parameter obtained from the population is called the ______________.
Sampling Error

A ______________ are errors made during collection, recording, and tabulation of data.
nonsampling errors

The sampling error is the difference between the value of a _____________ and the value of the corresponding population parameter.
sample statistic
Sampling error =


