Exam 7: Hypothesis Testing With Z Tests

The statement, "It is hypothesized that participants in a stress condition will perform in a significantly different manner than participants in a control group on a series of memory tasks" best illustrates a:

The fifth step in hypothesis testing is:

The _____ is a test statistic value beyond which one rejects the null hypothesis.

If a dependent variable is nominal, the assumption that the _____ should not be made.

In a raw score to z score transformation, an associated value on the z table provides the percentage of scores:

One rejects the null hypothesis when the test statistic falls in which area of the distribution?

In one statistics course, students reported studying an average of 9.92 hours a week, with a standard deviation of 4.54.Treating this class as the population, what percent of students study more than 8 hours? (Round z score to two decimal places.)

Under what conditions is the assumption that the dependent variable is assessed on a scale measure NOT met?

A z score _____ the mean will always be _____.

A one-tailed test effectively doubles the p level in that one tail.

The _____ refers to the areas in the tails of the distribution in which one determines statistical significance or rejection of the null hypothesis.

In one statistics course, students reported studying an average of 9.92 hours a week, with a standard deviation of 4.54.Treating this class as the population, what is the percentile for a student in the class who studies 8 hours a week? (Round z score to two decimal places.)

A major reason replication of scientific findings has rarely been attempted is because:

The statement "It is hypothesized that students will score higher on their test when they eat breakfast beforehand compared to not eating breakfast." best illustrates an example of a:

Use the following to answer questions Study Description: Dance Dance Revolution Unnithan, Houser, and Fernhall (2006) were interested in whether playing the game Dance Dance Revolution (DDR) affected the heart rate of overweight adolescents differently than it affected non-overweight adolescents.Twenty-two adolescents, 10 classified as overweight and 12 as not overweight, played DDR for 12 minutes, while the researchers measured each participant's heart rate.On average, the researchers found no difference between the heart rate of the two groups. -(Study Description: Dance Dance Revolution) Which statement is the research hypothesis for this study?

The critical values for a statistical test mark the value beyond which one can fail to reject the null hypothesis.

If one rejects the null hypothesis, the result is said to be:

Under what conditions is it permissible to proceed with a hypothesis test even though the assumption that participants are randomly selected is violated?

A score equal to the mean of its distribution falls at the 50th percentile.

Which statement regarding the denominator of the equation for the z score and that of the z statistic is true?