Exam 7: Hypothesis Testing With Z Tests

A _____ test makes assumptions about the population, whereas a _____test does not.

The critical value(s) associated with a p level of 0.05 for a one-tailed hypothesis test using the z statistic is (are):

If the assumptions of parametric testing are not met, researchers must:

The fourth step in hypothesis testing is:

The research hypothesis states that:

Under what conditions are the inferential statistics used typically robust against violations of assumptions?

Inferential statistical analyses that are NOT based on a set of assumptions about the underlying population are:

If the percentage of scores falling between the mean and a z score of 0.50 is 19.15, then what is the percentage of scores falling below a z score of -0.50?

Children are regularly assessed for their height and weight compared to national data provided by the Centers for Disease Control.Dahlin is somewhat short for his age, and his mother notices on his medical chart that it says Height: z = -1.67.What does this tell Dahlin's mother about his height?

The third step in hypothesis testing is:

Which statement is NOT an assumption of parametric hypothesis tests?

A nonparametric test is based on assumptions about the population.

The critical value(s) associated with a p level of 0.05 for a two-tailed hypothesis test using the z statistic is (are):

The statement "It is hypothesized that men and women will differ on reaction time measures" best illustrates a:

Demi converted scores from a customer service questionnaire to z scores, and some of them are negative.She is trying to use a z table but is confused because there are no negative z scores in the tables.What should she do?

Assume the average height for American women is 64 inches with a standard deviation of 2 inches.What percent of groups of size 25 would have mean heights of less than 62 inches? (Round z score to two decimal places.)

Which of these is NOT an appropriate tool for locating a specific point on a normal bell-shaped curve?

A hypothesis test is said to be _____ when it produces fairly accurate results, even when some of the assumptions underlying the hypothesis test are violated.

Why is it important to check for violations of assumptions when hypothesis testing?

Use the following to answer questions Study Description: Tail Wagging A New York Times article published on April 24, 2007, reported the research of Dr.Giorgio Vallortigara, a neuroscientist at the University of Trieste, Italy, and his two colleagues.The researchers asked whether a dog wags its tail in a preferred direction in response to positive stimuli and in another direction in response to negative stimuli.To answer their question, they recruited 30 dogs that were family pets.Filming each dog from above, they allowed it to view (through a slat in its cage) three positive stimuli separately, in order of descending positivity: its owner, an unfamiliar human, and a cat.All the dogs responded by wagging their tails to the right.But when the dogs were presented with an unfamiliar, aggressive dog, a negative stimulus, all dogs wagged their tails to the left. -(Study Description: Tail Wagging) Which statement is the null hypothesis for this study?