Question 3

A researcher evaluates how performance on a short answer test or multiple choice test differs among students who are in a remedial, average, or advanced statistics class. The researcher tests each factor both individually and combined.

Remedial, Short answer:78, 75, 62, 80, 72.

Average, Short Answer:75, 89, 92, 73, 80

Advanced, Short answer:90, 88, 98, 91, 80

Remedial, MC:80, 78, 88, 72, 83

Average, MC:90, 88, 94, 92, 86

Advanced, MC:92, 98, 95, 84, 72

Build the appropriate file, execute the analysis, print out the output. Finally, type an APA result that includes the descriptive statistics, complete statistical notation, and translates the outcomes of the analysis in the words of the problem.

Question 2

Second grade children performed the same task (reading from a computer screen that monitored visual time on task) under two conditions; with teacher present and teacher absent. Half of the children first completed the task with the teacher present, followed by teacher absent. The other half of the children completed the same task without the teacher and then with the teacher present. The researcher wanted to determine whether there was a significant difference in time spent on the task as a function of the teacher's presence and absence.

Teacher present: 180, 245, 215, 260, 300, 280, 250, 310

Teacher absent: 170, 220, 195, 265, 275, 290, 220, 285

Build the appropriate file, execute the analysis, print out the output. Finally, type an APA result that includes the descriptive statistics, complete statistical notation, and translates the outcomes of the analysis in the words of the problem.

The double-bar graph shows sales of super unleaded and supreme unleaded gasoline at a service station for each of\( 5 \)years.

Find the increase in supreme unleaded gasoline sales from\( 2009 \)to\( 2011 .\)

\(\square \)more gallons were sold in\( 2011 \)than in\( 2009 . \)(Type a whole number.)

Below is a list for the number of calories in certain fast-food items. Find the median.

\( 503,405,521,515,304,616,326,522\)

The median is\( \square \).

(Simplify your answer.)

For the following set of annual salaries, find the mean.

\(\$ 40000 , \$ 40200 , \$ 41300 , \$ 39800 , \$ 41300 , \$ 40300 , \$ 39900\)

The mean salary is\( \$ \square \).