A line graph displays the temperature of a freezer recorded every hour over a 24-hour period. Instead of a relatively stable pattern, the graph shows extreme peaks and valleys, with the temperature rapidly rising and falling by large amounts from one hour to the next, even though the freezer door remained closed. Assuming that you know that the freezer worked normally the entire time. What is the most reasonable conclusion based on this graph?

A researcher is studying the average height of adult women. She randomly selects many different samples of 50 women, from the same population. For each sample, she calculates the average height of the sample. Instead of looking at the individual heights, she creates a graph that shows how these sample averages are distributed across all the samples.What is this graph called?

A class receives exam scores that are ordered from lowest to highest. A student wants to know whether his score of 82 is higher than most of the class or close to the middle. The teacher reports that a score of 82 falls in the 75th percentile.What does this information tell the student?

10. Two different random samples are taken from the same population, and the sample means are slightly different. This difference is best explained by:

7. A researcher wants to study study habits of all college students in the U.S. but collects data from 500 students at one university. The 500 students who provided data represent the:

2. In a clinical study testing a new allergy medication, neither the participants nor the researchers who interact with them know who is receiving the real drug and who is receiving a placebo. This study design is best described as:

24. What does the F statistic in ANOVA compare?

20. Two groups have averages of 70 and 72. The difference is small compared to how much scores vary inside each group. What is most likely true?

25. What is a residual in regression?

Non-steroidal anti-inflammatory drugs (NSAIDs) increase the risk of gastrointestinal bleeding because: (1)