Which of the following statements is the best description of statistical sampling?

One sample is just as good as another when it comes to making inferences.

A population is used to make inferences about a sample.

A sample is used to make inferences about a population.

Descriptive statistics are applied to populations rather than to samples.

2.

This figure shows the standard normal distribution. (see attachment)

According to this figure, if someone has azscore of ?1, this places her or him in the ____ percentile of the standard normal distribution?

95th

16th

50th

2.5th

3.

When using a random sample, the sample mean,M, will

tend to be near the population mean, ?.

differ from the population mean, ?, by the SD.

always be just a bit less than the population mean, ?.

be exactly the same as the population mean, ?.

4.

In general, which of these would provide the best estimate of the population mean?

a sample of 1,000 participants

a sample of 1 participant

It is not the size of the sample but its quality that matters most.

a sample of 100 participants

5.

What is the standard error of the mean?

the sample size

a problem that occurs when trying to calculate a mean with sample size of zero

the average amount by which a sample mean mis-estimates the population mean

another name for a z score

6.

The standard error of the mean is

the standard deviation of the population divided by the sample size.

the ratio of the median and the mode.

the mean of the outliers divided by the standard deviation.

the mean of the population divided by M.

7.

According to the ________, the means of many different samples tend to be normally distributed.

Central Limit Theorem

Law of Small Numbers

Variation Tendency Hypothesis

Hook/Smyrnoff Law

8.

A normal distribution

has a U shape.

has two modes.

is symmetrical.

is not commonly found in psychological research.

9.

Which of the following expressions is the correct formula for azscore of a sample from a population?

?X

(X - ?) / ?

?SD²

(X - ?)²/ n

10.

Juan worked really hard in his math class and scored way above the class average. What will Juan'szscore be?

less than 0

greater than 0

right around 0

within 1 SD of the class average

\f