haracteristic, such as the population mean. e percent of time that a series of c
ID: 2934699 • Letter: H
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haracteristic, such as the population mean. e percent of time that a series of confidence intervals includes the unknown Margin of error-That which is added to and subtracted from some sample value, such as the sam proportion or sample mean, to obtain the limits of a confidence interval Text Review A researcher may wish to estimate the value of a population mean rather than test a hypothesis based on a population mean. Estimation is possible with use of (1), and A point estimate is a single value that represents some unknown characteristic. The problem with point estimates is that they tend to be Therefore. because of (5) the researcher uses a more accurate type of estimate, (6) A confidence interval is a range of values that, with a known degree of certainty, includes an unknown population characteristic, such as (7) To understand confidence intervals, you must be aware of three important properties of the (b) The standard error of the sampling distribution equals the sampling distribution of the mean. (a) The mean of the sampling distribution always equals the population standard deviation divided by the square root of the (9), The shape of the sampling distribution approximates a normal distribution if sample size satisfies the (10) A confidence interval can be constructed using formula 17.1, where a value of z from the standard normal table is multiplied by the standard error (S.E.) and this value is both added to and subtracted from the mean. In order to use this formula, the (11) must be known and sample size must be at least (12) In practice, only one confidence interval is actually constructed, and it is either (13) Although we never really know whether a particular confidence interval is or (14) true or false, we of confidence indicates the percent of time that a series of confidence intervals includes the unknown population characteristic such as the p wider confidence interval that is less (15) increase in (16) can be reasonably confident when the level of confidence is 95% or more. The level pulation mean. An increase in confidence interval causes a unless it is offset by an Although many different levels of confidence have been used. (17) are the most prevalent. Confidence intervals are more narrow or precise when standard error is smallerExplanation / Answer
1) Sample mean
2)standard deviaion
3)population
4) uncertain
5)errors
6)confidence interval
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