1.Is Drug B superior to the currently used Drug A in treating pancreatitis? Which type of study is most appropriate for answering this research question?

Observational

Case-controlled observational

Double-blind experiment

Single-blind experiment

2.Research shows that 14% of 6th graders in K-6 schools have tried cigarettes and 61% of 7th graders in 7-9 middle schools have tried cigarettes. What is the absolute increase, to the nearest percent?

0.77

3.36

4.36

0.47

3.Consider the following exam scores: 76 72 87 96 99 75 84 85 84 94 92. What is the range of the scores and what would be appropriate bins to place them in?

76-92; Bins: 70-80, 80-90, & 90-100

72-99; Bins: 70-75, 76-80, 81-85, 86-90, 91-95, & 96-100

72-99; Bins: 70-75, 75-80, 80-85, 85-90, 90-95, & 95-100

76-99; Bins: 70-75, 75-80, 80-85, 85-90, 90-95, & 95-100

4.A bar graph in which the bars are arranged in frequency order is a

dotplot.

pie chart.

line chart.

pareto chart.

5.A bar graph in which the bars are arranged in frequency order is a

dotplot.

pie chart.

line chart.

pareto chart.

6.Which one of the three variables below is most likely to be normally or nearly normally distributed?

The results of throwing a die 1000 times

The lengths of randomly selected white pine needles

The number of people standing in line at five cash registers

None of the above

7.The advertising for a cold remedy claimed that no other cold remedy acted faster. In an experiment to compare that remedy with another one, it did act faster on average, but the result wasn't significant. What does this mean?

The difference was so small that it could have happened by chance even if the remedies were equivalent.

The difference was so small that it could have happened by chance even if the remedies weren't equivalent.

The probability of the observed difference occurring by chance if the two remedies are equivalent was less than 0.05.

The population mean response times are different, but the samples didn't show it.

8.There are 318 teachers at a college. Among a sample of 115 teachers from this college, 67 have doctorates. Based on this sample, estimate the population proportion of teachers at this college with doctorates.

0.42

185

0.61

0.58

9.The standard score for a two-tailed test is 2.0. What is the P-value?

0.9772

0.0456

0.0228

97.72

10.The _______ hypothesis states that the variables are independent (there's no relationship between them) and the _______ hypothesis states that there's a relationship between the two variables.

population; sample

alternative; null

sample; population

null; alternative