Do this quiz

What is a hypothesis?

Reset Selection

A researcher tests whether a new teaching method is more effective than the old one. What is the RESEARCH hypothesis?

Reset Selection

A researcher tests whether there is any difference between how fast people work in the morning versus how fast they work in the evening. What is the NULL hypothesis?

Reset Selection

What represents the situation in which the null hypothesis is true?

Reset Selection

A result is considered statistically significant when a sample value is so extreme that:

Reset Selection

How do you determine whether or not to reject the null hypothesis?

Reset Selection

If the null hypothesis is rejected, the researcher can conclude that the results:

Reset Selection

Which of the following is NOT a correct statement of one of the five steps of hypothesis testing?

Reset Selection

There is a special complication when using a two-tailed test. The researcher must:

Reset Selection

A Type I error is the result of:

Reset Selection

Type II errors concern scientists because:

Reset Selection

The distribution of means is also called:

Reset Selection

The distribution of means is the correct comparison distribution when:

Reset Selection

Knowledge of what three important characteristics of the comparison distribution is required for hypothesis testing?

Reset Selection

In general, the shape of a distribution of means tends to be:

Reset Selection

As the number of individuals in each sample gets larger, the distribution of means:

Reset Selection

When a researcher has obtained a particular sample mean from a study, he or she compares it to:

Reset Selection

A distribution of means will be less spread out than the population of individuals from which the samples are taken because:

Reset Selection

The standard deviation of the distribution of means is also known as the:

Reset Selection

With samples of 30 or more individuals, the approximation of the distribution of means will be:

Reset Selection

The variance of a distribution of means is the variance of the population of individuals:

Reset Selection

All of the following types of distributions are important for hypothesis testing EXCEPT:

Reset Selection

The difference between creating a Z score from a single score and creating one from a sample mean is that:

Reset Selection

The Z score of the sample mean on the distribution of means is:

Reset Selection

The best estimate of the population mean is the:

Reset Selection