COMS 100C: Chapter 8

Inferential statistics allow us to make an inference about a wider population with 100% certainty.

False

This range of possible values calculated for a particular level of confidence is called the confidence interval.

True

Inferential statistics are based on the assumption(s) EXCEPT ___

snowball sampling

The extent to which sample data reflect the wider population from which the sample was drawn can be estimated using which one of the following?

inferential statistics

The probability of sampling any value under the normal curve that is greater than the mean is

0.5

The probability of sampling any value under the normal curve is _____

1.00

The properties of a normal curve are such that ______ of the values under it occur plus or minus 1 standard deviation from the mean.

68%

In a normal distribution, most values are __

in the middle of the distribution

Type I error is deciding that ___

you have a significant finding when in fact you do not

Type II error is deciding that ______.

you have no significant result when in fact you do