Category: Uncategorized

Which effect causes people to perceive messages with an intended positive emotion as neutral?

Round the following value to four decimal places: 3.45509

Which of the following levels of measurement involves variables that are qualitative?

A researcher studies the relationship between the amount of time spent studying for an exam and the number of errors made.  A sample of twenty students who have the same GPA are randomly assigned to one of four groups:  1, 2, 3, or 4 hours of study time. After studying the specified time, all students took an identical exam and the number of errors each student made was counted. What is the independent variable?

What information is provided in a typical stem-and-leaf plot?

When the levels of a variable can be ordered on some continuum or dimension from high to low, that variable is said to be measured on at least a(n) _____ level.

Write the standard form equation of the parabola with a focus at (4,-1) and a directrix at y=5.    You should show work for this problem. 

Based on the stem-and-leaf plot below, representing scores on an exam, what was the frequency for a score of 36? 10 : 0  9 : 2  8 : 233  7 : 5  6 :  5 : 00555588  4 : 222  3 : 666  2 : 777  1 : 7  0 : 8 *each stem represents the hundreds and tens place; each leaf represents the ones place

A researcher is interested in whether frequencies of ice cream preference are evenly distributed across the three categories of vanilla, chocolate, and strawberry. Use the data in the table below to test the prediction that ice cream preference is evenly distributed. **Report the observed chi-square statistic to 4 decimal places. Ice Cream Preference N Vanilla 87 Chocolate 64 Strawberry 44  

If the scores of a class at midterm are 70, 70, 70, 80, 80, 90, 92, and 92, what is the cumulative relative frequency of the score 80?