What is referred to by the term observed frequencies?

In a normal distribution what percent of scores are within two standard deviations from the mean?

How does the difference between fe and fo influence the outcome of a chi-square test?

In a normal distribution what percent of scores are within two standard deviations from the mean?

A researcher is conducting a study on the probability of drawing the Jack, Queen, King, and Ace of Hearts from a standard deck of cards with 52 cards. What is the probability of selecting one of these 4 cards?

The following data were obtained from a repeated-measures research study. What is the value of MD for these data?Subject            1st       2nd   #1                  8          15   #2                  6          10   #3                10            5   #4                  9          17   #5                  7          13

An advertising company would like to know which of three popular TV shows puts people in the best mood. Participants are randomly assigned to watch one of three TV shows and then completed a questionnaire that assesses mood. The TV shows and mood scores are 30 Rock (M = 18), The Office (M = 24), and Family Guy (M = 20). Higher scores indicate better moods. The ANOVA results are F(2, 149) = 3.42, p < .01. Based on these results, which conclusion is true?

What is the mean for the following scores?  Scores: 1, 6, 14

Which of the following cannot be measured on an ordinal scale?

Which of the following sets of sample data would produce the largest value for an independent-measures t statistic?